Seamless pipes by applications

Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries.

Types Uses
Structure Purposes General structure and mechanical
Liquid Services Petroleum, gas and other fluids conveying
Low and Medium Pressure Steam and boiler manufacturing
Hydraulic Pillar Service Hydraulic support
Auto Semi-shaft Casing Auto sem-shaft casing
Line Pipe Oil and gas conveying
Tubing and Casing Oil and gas conveying
Drill Pipes Well drilling
Geological Drilling Pipes Geological drilling
Petroleum Cracking Tubes Furnace tubes, heat exchangers

Main products and application
Steel Grade Standard Application
GB(China) ASME(USA) DIN/EN(Euro) JIS(Jpan)
Carbon steel 10
20
20G
20MnG
25MnG
Q345B/C/D/E
A106
SA-106B
SA-106C
SA-192
SA-210A1
SA-210C
St35.8
St45.8
P235GH
P265GH
STB340
STB410
STB510
Economizer tube Water wall tube, pipeline, header pipe, Petrochemical furnace tube, heat exchange tube
Mo steel 15MoG
20MoG
SA-209 T1
SA-209 T1a
SA-209 T1b
16Mo3 15Mo3
16Mo3
Water wall tube
Superheater tube
Reheater tube
Cr-Mo Steel
Cr-Mo-V steel
12Cr1MoG
12Cr2MoWVTiB
  12Cr1MoV
14MoV63
  Superheater tube
Reheater tube,
Pipeline, Header pipe, Petrochemical furnace tube, Heat exchange tube
Cr-Mo-Steel
Cr-Mo-W Steel
Cr-Mo Steel
Cr-Mo-W steel
12CrMoG
15CrMoG
12Cr2MoG
10Cr9Mo1VNbN
10Cr9MoW2VNbBN
12Cr1Mo
12Cr5Mol/NT
12Cr9Mol/NT
T11/P11
T12/P12
T22/P22
T23/P23
T24/P24
T5/P5
T9/P9
T91/P91
T92/P92
10CrMo5-5
12CrMo4-5
10CrMo9-10
7CrWVMoNb9-6
7CrMoVTIB10-10
X10CrMoVNb9-1
X10CrWMoVNb9-2
X11CrMo5+l/NT
X11CrMo9-1+l/NT
STB20
STB22
STB23
STB24
STB25
STB26
Superheater tube, Reheater tube, Main steam pipe, Pipleline, Header pip, Petrochemical furnace tube, Heat exchange tube
Carbon steel
Ni steel
16MnDG
10MnDG
09DG
A333-1
SA-333-1
A333-6
SA-333-6
A333-3
SA-333-3
  STPL380
STPL450
Tube & pipe for Low-temperature service
Austentic Stainless steel   ---   AP304  TP304H
TP321 TP321H
TP347 TP347H
TP316 TP316H
S30432 TP310HCbN
    ---   Superheater tube
Reheater tube

Tolerances of pipes you should notice

Take seamless steel pipe as an example, there are some tolerances that affect quality. Noting this, and you will get a better pipe.

Weight tolerance

For pipe NPS 12 (DN300, 323.8mm) and under, the weight shall vary within -3.5% / +10%.

For pipe over NPS 12 (DN300, 323.8mm), the weight shall vary within -5% / +10%.

Pipe of NPS 4 (DN100, 114.3mm) and smaller may be weighed in convenient lots; pipe in sizes larger than NPS 4 shall be weighed separately.

Quantity tolerance

Normally mills take -10% to +10% tolerance, but TPMCSTEEL keeps ±3% variation.

Length tolerance

For Seamless pipe& tube, if definite cut lengths are ordered, the length shall vary within -0mm / +6mm.

Dimension tolerances of seamless steel pipe
Pipe types Pipe Szie(mm) Tolerances
Hot rolled OD <50 ±0.50mm
≥50 ±1%
WT <4 ±12.5%
≥4-20 +15%, -12.5%
>20 ±12.5%
Cold drawn OD 6-10 ±0.20mm
10-30 ±0.40mm
30-50 ±0.45
>50 ±1%
WT <1 ±0.15mm
>1-3 + 15%, – 10%
>3 + 12.5%, – 10%

Tolerance on dimension

Tolerances on out diameter

For pipe over 10 inches as a special OD tolerance pipe, the OD shall within vary +1% /-1%.

Standard Hot finished seamless tube Cold flnished seamless tube
Out diameter
(mm)
Tolerance Out diameter
(mm)
Tolerance
EN10216-1
EN10216-2
DIN17175
≤100  +/-0.75%
(min.+/-0.5mm)
All  +/-0.5%
(min. +/-0.30mm)
>100  +/-0.90%
GB/T 3087 ≤460  +/-0.75%
(min.+/-0.5mm)
 10-30   +/-0.40mm
>30-50  +/-0.45mm
>50  +/-1.0%
GB/T 5310
GB/T 9948
GB/T 6479
<57  +/-0.40mm ≤30  +/-0.20mm 
 57-325   +/-0.75% >30-50   +/-0.30mm 
>325-460  +1%,-2mm >50  +/-0.8% 
ASME SA-179M
ASME SA-192M
ASME SA-209M
ASME SA-210M
ASME SA-213M
JIS G 3461
JIS G 3461
≤101.6  +0.4, -0.8mm <25.4  +/-0.10mm
>25.4-38.1  +/-0.15mm
>38.1-50.8  +/-0.20mm 
101.6-190.5  +0.4, -1.2mm >50.8-63.5  +/-0.25mm
>63.5-76.2  +/-0.30mm 
>76.2  +/-0.38mm
ASME SA106
ASME SA335
≤48.3  +/-0.40mm  ≤48.3  +/-0.40mm
 48.3-114.3  +/-0.79mm 
114.4-219.1  +1.59, -0.79mm 
219.2-323.9  +2.38, -0.79mm >48.3  +/-0.79mm 
>324  +/-1.0%
Tolerance on dimension

For standard pipe, except as provided for thin-wall pipe, the tolerances of diameter shall be in accordance with the following table:

Standard Hot finished seamless tube Cold flnished seamless tube
Out diameter
(mm)
Tolerance Out diameter
(mm)
Tolerance
EN10216-1
EN10216-2
DIN17175
≤100  +/-0.75%
(min.+/-0.5mm)
All  +/-0.5%
(min. +/-0.30mm)
>100  +/-0.90%
GB/T 3087 ≤460  +/-0.75%
(min.+/-0.5mm)
 10-30   +/-0.40mm
>30-50  +/-0.45mm
>50  +/-1.0%
GB/T 5310
GB/T 9948
GB/T 6479
<57  +/-0.40mm ≤30  +/-0.20mm 
 57-325   +/-0.75% >30-50   +/-0.30mm 
>325-460  +1%,-2mm >50  +/-0.8% 
ASME SA-179M
ASME SA-192M
ASME SA-209M
ASME SA-210M
ASME SA-213M
JIS G 3461
JIS G 3461
≤101.6  +0.4, -0.8mm <25.4  +/-0.10mm
>25.4-38.1  +/-0.15mm
>38.1-50.8  +/-0.20mm 
101.6-190.5  +0.4, -1.2mm >50.8-63.5  +/-0.25mm
>63.5-76.2  +/-0.30mm 
>76.2  +/-0.38mm
ASME SA106
ASME SA335
≤48.3  +/-0.40mm  ≤48.3  +/-0.40mm
 48.3-114.3  +/-0.79mm 
114.4-219.1  +1.59, -0.79mm 
219.2-323.9  +2.38, -0.79mm >48.3  +/-0.79mm 
>324  +/-1.0%
Tolerances on wall thickness

The wall thickness at any point shall be within the below tolerance table.

Standard Hot finished seamless tube Cold flnished seamless tube
Out diameter
OD(mm)
Wall thickness
T(mm)
Tolerance Out diameter
(mm)
Wall Thickness
T(mm)
Tolerance
DIN17175 ≤130 S≤2Sn  +15%, -10%    -- All  +/-10%
(min. +/-0.2mm)
2Sn<S≤4Sn  +12.5%, -10% 
S>4Sn  +-/9%
>130 S≤0.05da  +17.5%, -12.5% 
0.05da<S≤0.11da  +/-12.5% 
S>0.11da  +/-10% 
EN 10216-1
EN 10216-2
 ≤219.1   -    +/-12.5%
(min.+/-0.4mm) 
 --  T/D≤0.025  +/-20% 
0.025<T/D≤0.050  +/-15% 
0.05<T/D≤0.10  +/-12.5% 
0.1<T/D  +/-10% 
GB/T 3087  --  ≤20  +15%,-12.5%
(min.+0.45, -0.35mm)
 --   1.0-3.0   +15%, -10% 
>20  +/-12.5%   --  >3  +12.5%, -10% 
GB/T 5310
GB/T 9948
GB/T 6479
 --  <4.0  +15%,-10%
(min.+0.48, -0.32mm)
 --   2-3   +12%,-10% 
 4-20   +12.5%,-10%  >3  +/-10% 
>20  +/-10%
ASME SA-179M
ASME SA-192M
ASME SA-209M
ASME SA-210M
ASME SA-231M
JIS G 3461
JIS G 3462
 --   2.41-3.8   +35%, -0%  ≤38.1  --   +20%,-0% 
 3.8-4.6   +33%,-0%  >38.1  --  22%,-0% 
>4.6  +28%,-0%   --   --   -- 
ASME SA-106
ASME SA-335
 --  All  +/12.5%    All  +/-10% 

Note:

  1. The size in the table above is for the hot-rolled tubes.
  2. The size of the green area is the regular specification, we can accept orders directly, but the yellow area shall be subject to a technical evaluation.
  3. The Out side diameter (O.D) and wall thickness (W.T.) of the tube should be complied.
A new ceramic tip shape for a ceramic lined pipe
A new ceramic tip shape
The wear resistant ceramic lining steel pipe feature
The wear resistant ceramic lining steel pipe feature

At the request of the purchaser and specified in the purchase order, the steel tubes with other O.D. and W.T. can be produced after the review.

Available size range

Table 1, size for cold-drawn or cold rolled tube (Unit:mm)
   W.T.
O.D.
2.5 3 3.2 3.5 4.0 4.5 5 5.5 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 11.0 12.0 13.0 14.0 15.0 16.0
18                                            
19                                            
22                                            
24                                            
25                                            
28                                            
29                                            
30                                            
31.8                                            
35                                            
38                                            
40                                            
42                                            
45                                            
48                                            
50                                            
51                                            
54                                            
57                                            
60                                            
63.5                                            
68                                            
70                                            
73                                            
76                                            
83                                            
89                                            
   W.T.
O.D.
2.5 3 3.2 3.5 4.0 4.5 5 5.5 6.5 7.0 7.5 8.0   9.0 9.5 10.0 11.0 12.0 13.0 14.0 15.0 16.0

Note:

  1. The size in the table above is for the cold-drawn or cold-rolled tubes.
  2. The size of the green area is the regular specification, we can accept orders directly, but the yellow area shall be subject to a technical evaluation.
  3. The Out side diameter (O.D) and wall thickness (W.T.) of the tube should be complied.

At the request of the purchaser and specified in the purchase order, the steel tubes with other O.D. and W.T. can be produced after the review.

Size for hot-rolled tube (318.-180mm)
(Unit:mm)
   W.T.
O.D.
3.2 3.5 3.6 4.0 4.5 5.0 5.5 5.6 6.0 7.0 7.1 7.5 8.0 8.5 8.8 9.0 9.5 10.0 11.0 12.0 12.5 13.0 14.0 14.2 15.0 16.0 17.0 17.5 18.0 19.0 20.0 22.2 24.0 25.0 30.0
31.8                                                                      
33.4                                                                      
35                                                                      
40                                                                      
42                                                                      
42.4                                                                      
44.5                                                                      
45                                                                      
48                                                                      
50                                                                      
51                                                                      
54                                                                      
57                                                                      
60                                                                      
63                                                                      
63.5                                                                      
68                                                                      
70                                                                      
71                                                                      
73                                                                      
76                                                                      
82                                                                      
89                                                                      
95                                                                      
101.6                                                                      
108                                                                      
114.3                                                                      
121                                                                      
127                                                                      
133                                                                      
140                                                                      
146                                                                      
152                                                                      
159                                                                      
165                                                                      
168                                                                      
180                                                                      
Size for hot-rolled tube (OD.:200-457mm)
(Unit:mm)
   W.T.
O.D.
6 6.4 6.7 7 7.4 7.6 9 9.5 10 14 16 20 25 30 32 35 40 46 50 52 55 60
200.03                                            
219.1                                            
244.5                                            
269.8                                            
273                                            
298.5                                            
325                                            
339.7                                            
351                                            
355.6                                            
365.1                                            
377                                            
402                                            
406.4                                            
426                                            
431.8                                            
457                                            

Chemical composition

Steel is an alloy of iron and other elements. Some elements are intentionally added to iron for the purpose of attaining certain specific properties and characteristics. Other elements are present incidentally and cannot be easily removed. Such elements are referred to as “trace” or “residual” elements.

Many product specifications have mandatory requirements for reporting certain elements and these vary. Most mills routinely provide heat analysis which includes the elements below. Although it is possible to analyze for other elements this is most often not practical or necessary unless they are additions (e.g. Pb – Lead, Sb – Antimony or Co - Cobalt).

Grade Steel Grade C Si Mn S P Cr Mo V Ti B W Ni Al Nb N Others
Standard
GB 3087 10 0.07-0.13 0.17-0.37 0.35-0.65 0.020 0.025 ≤0.15                    
20 0.17-0.23 0.17-0.37 0.35-0.65 0.020 0.025 ≤0.25                    
GB/T 9948 10 0.07-0.13 0.17-0.37 0.35-0.65 0.020 0.025 ≤0.15                    
20 0.17-0.23 0.17-0.37 0.35-0.65 0.020 0.025 ≤0.25                    
12CrMo 0.08-0.15 0.17-0.37 0.40-0.70 0.015 0.025 0.40-0.70 0.40-0.55                  
15CrMo 0.12-0.18 0.17-0.37 0.40-0.80 0.015 0.025 0.80-1.10 0.40-0.55                  
12Cr1Mo 0.08-0.15 0.17-0.37 0.40-0.70 0.010 0.025 1.00-1.50 0.45-065                  
12CrMoV 0.08-0.15 0.50-1.00 0.30-0.60 0.015 0.025 1.00-1.50 0.45-0.55                  
12Cr1MoV 0.08-0.15 0.17-0.37 0.40-0.70 0.010 0.025 0.90-1.20 0.25-0.35                  
12Cr2Mo 0.08-0.15 ≤0.5 0.40-0.60 0.015 0.025 2.00-2.50 0.90-1.13                  
12Cr5Mol/NT ≤0.15 ≤0.5 0.40-0.60 0.015 0.025 2.00-2.50 0.90-1.13                  
12Cr9Mol/NT ≤0.15 0.25-1.0 0.30-0.60 0.015 0.025 8.0-10.0 0.90-1.10                  
  10 0.07-0.13 0.17-0.37 0.35-0.65 0.020 0.025 ≤0.15                    
  20 0.17-0.23 0.17-0.37 0.35-0.65 0.020 0.025 ≤0.25                    
  12CrMo 0.08-0.15 0.17-0.37 0.40-0.70 0.015 0.025 0.40-0.70 0.40-0.55                  
  15CrMo 0.12-0.18 0.17-0.37 0.40-0.80 0.015 0.025 0.80-1.10 0.40-0.55                  
  12Cr2Mo 0.08-0.15 ≤0.5 0.40-0.60 0.015 0.025 2.00-2.50 0.90-1.13                  
  12Cr5Mo ≤0.15 ≤0.5 0.40-0.60 0.015 0.025 2.00-2.50 0.90-1.13                  
  Q345B/C/D/E 0.12-0.18 0.20-0.50 1.20-1.70 0.010 0.025                      
DIN 17175 St 35.8 ≤0.17 0.10-0.35 0.40-0.80 0.020 0.025                      
St 45.8 ≤0.21 0.10-0.35 0.40-1.20 0.020 0.025                      
15Mo3 0.12-0.20 0.10-0.35 0.40-0.80 0.020 0.025   0.25-0.35                  
13CrMo44 0.10-0.18 0.10-0.35 0.40-0.70 0.020 0.025 0.70-1.10 0.45-0.65                  
10CrMo910 0.08-0.15 ≤0.50 0.40-0.70 0.020 0.025 2.00-2.50 0.90-1.20                  
14MoV63 0.10-0.18 0.10-0.35 0.40-0.70 0.020 0.025 0.30-0.60 0.50-0.70 0.22-0.32                
12Cr1MoV 0.08-0.15 0.17-0.37 0.40-0.70 0.020 0.025 0.90-1.20 0.25-0.35 0.15-0.30                
GB5310 20G 0.17-0.23 0.17-0.37 0.35-0.65 0.015 0.025                      
20 MnG 0.17-0.24 0.17-0.37 0.70-1.00 0.015 0.025                      
25 MnG 0.22-0.27 0.17-0.37 0.70-1.00 0.015 0.025                      
15 MoG 0.12-0.20 0.17-0.37 0.40-0.80 0.015 0.025   0.25-0.35                  
20 MoG 0.15-0.25 0.17-0.37 0.40-0.80 0.015 0.025   0.44-0.65                  
12CrMoG 0.08-0.15 0.17-0.37 0.40-0.70 0.015 0.025 0.40-0.70 0.40-0.55                  
15CrMoG 0.12-0.18 0.17-0.37 0.40-0.70 0.015 0.025 0.80-1.10 0.40-0.55                  
12Cr2MoG 0.08-0.15 ≤0.60 0.40-0.60 0.015 0.025 2.00-2.50 0.90-1.13                  
12Cr1MoVG 0.08-0.15 0.17-0.37 0.40-0.70 0.010 0.025 0.90-1.20 0.25-0.35 0.15-0.30                
12Cr2MoWVTiB 0.08-0.15 0.45-0.75 0.45-0.65 0.015 0.025 1.60-2.10 0.50-0.65 0.28-0.42 0.08-0.18 0.002-0.008 0.30-0.55          
10Cr9Mo1VNbN 0.08-0.12 0.20-0.50 0.30-0.60 0.010 0.020 8.00-9.50 0.85-1.05 0.18-0.25       ≤0.40 ≤0.020 0.06-0.10 0.03-0.07  
10Cr9MoW2VNbBN 0.07-0.13 ≤0.50 0.30-0.60 0.010 0.020 8.50-9.50 0.30-0.60 0.15-0.25   0.001-0.006 1.50-2.00 ≤0.40 ≤0.020 0.04-0.09 0.03-0.07  
07Cr19Ni10 0.04-0.10 ≤0.75 ≤2.0 0.015 0.035 17.00-20.00   8.00-11.00                
07Cr18Ni11Nb 0.04-0.10 ≤0.75 ≤2.0 0.150 0.030 17.00-19.00           9.00-13.00 8C-1.10      
ASME SA-179M SA-179 0.06-0.18   0.27-0.63 0.020 0.030                      
ASTMA 106
ASME SA-106M
A 106B
SA-106B
≤0.30 ≥0.10 0.29-1.06 0.020 0.025                      
A 106C
SA-106C
≤0.35 ≥0.10 0.29-1.06 0.020 0.025                      
ASTM A192
ASME SA-192M
SA 192
SA-192
0.06-0.18 ≤0.25 0.27-0.63 0.020 0.025                      
ASTM A209
ASME SA-209M
A209T1
SA-209T1
0.10-0.20 0.10-0.50 0.30-0.80 0.020 0.025   0.44-0.65                  
A209T1b
SA-209T1b
≤0.14 0.10-0.50 0.30-0.80 0.020 0.025   0.44-0.65                  
A209T1a
SA-209T1a
0.15-0.25 0.10-0.50 0.30-0.80 0.020 0.025   0.44-0.65                  
ASTM A210
ASME SA-210M
A 210A1
SA-210A1
≤0.27 ≥0.10 ≤0.93 0.020 0.025                      
A 210C
SA-210C
≤0.35 ≥0.10 0.29-1.06 0.020 0.025                      
ASME SA-335M
ASTM A335M
P1 0.10-0.20 0.10-0.50 0.30-0.80 0.020 0.025   0.44-0.65                  
P2 0.10-0.20 0.10-0.30 0.30-0.61 0.020 0.025 0.50-0.81 0.44-0.65                  
P5 ≤0.15 ≤0.50 0.30-0.60 0.020 0.025 4.00-6.00 0.45-0.65                  
P9 ≤0.15 0.25-1.00 0.30-0.60 0.020 0.025 8.00-10.0 0.90-1.10                  
P11 0.05-0.15 0.50-1.00 0.30-0.60 0.020 0.025 1.00-1.50 0.44-0.65                  
P12 ≤0.15 ≤0.50 0.30-0.61 0.020 0.025 0.80-1.25 0.44-0.65                  
P22 ≤0.15 ≤0.50 0.3 0.020 0.025 1.90-2.60 0.87-1.13                  
P23 0.04-0.10 ≤0.50 0.10-0.60 0.010 0.025 1.90-2.60 0.05-0.30 0.20-0.30   0.0005-0.006 1.45-1.75   ≤0.030 0.02-0.08 ≤0.030  
P24 0.05-0.10 0.15-0.45 0.30-0.70 0.010 0.020 2.20-2.60 0.90-1.10 0.20-0.30 0.06-0.10 0.0015-0.0070     ≤0.020   ≤0.012  
P91 Type1 0.08-0.12 0.20-0.50 0.30-0.60 0.010 0.020 8.00-9.50 0.85-1.05 0.18-0.25 ≤0.010     ≤0.40 ≤0.020 0.06-0.10   Zr≤0.010
P91 Type2 0.08-0.12 0.20-0.40 0.30-0.50 0.005 0.020 8.00-9.50 0.85-1.05 0.18-0.25 ≤0.010 ≤0.001   ≤0.20 ≤0.020 0.06-0.10   Cu,As, Sn≤0.010
W≤0.05, Sb≤0.003
P92 0.07-0.13 ≤0.50 0.30-0.60 0.010 0.020 8.50-9.50 0.30-0.60 0.15-0.25       ≤0.40 ≤0.040 0.04-0.09    
ASTM A213
ASME SA-213M
A 213 T2
SA-213 T2
0.10-0.20 0.10-0.30 0.30-0.61 0.020 0.025 0.50-1.81 0.44-0.65                  
A213 T5
SA-213 T5
≤0.15 ≤0.50 0.30-0.60 0.020 0.025 4.00-6.00 0.45-0.65                  
A213 T9
SA-213 T9
≤0.15 0.25-1.00 0.30-0.60 0.020 0.025 8.00-10.0 0.90-1.10                  
A 213 T11
SA-213 T11
0.05-0.15 0.50-1.00 0.30-0.60 0.020 0.025 1.00-1.50 0.44-0.65                  
A 213 T12
SA-213 T12
≤0.15 ≤0.50 0.30-0.61 0.020 0.025 0.80-1.25 0.44-0.65                  
A 213 T22
SA-213 T22
0.05-0.15 ≤0.50 0.30-0.60 0.020 0.025 1.90-2.60 0.87-1.13                  
A 213 T23
SA-213 T23
0.04-0.10 ≤0.50 0.10-0.60 0.010 0.025 1.90-2.60 0.05-0.30 0.20-0.30 0.005-0.06 0.0005-0.006 1.45-1.75   ≤0.03 0.02-0.08 ≤0.03 Ti/N≥3.5
A 213 T24
SA-213 T24
0.05-0.10 0.15-0.45 0.30-0.70 0.020 0.025 2.20-2.60 0.70-1.10 0.20-0.30 0.06-0.10 0.0015-0.0020     ≤0.02   ≤0.012  
A 213 T91
SA-213 T91
0.08-0.12 0.20-0.50 0.30-0.60 0.010 0.020 8.00-9.50 0.85-1.05 0.18-0.25       ≤0.40 ≤0.40 0.06-0.10 0.03-0.07  
A 213 T911
SA-213 T911
0.09-0.13 0.10-0.50 0.30-0.60 0.020 0.025 8.50-10.50 0.90-1.10 0.18-0.25   0.0003-0.006 0.90-1.10 ≤0.40 ≤0.40 0.06-0.10 0.04-0.09  
A 213 T92
SA-213 T92
0.07-0.13 ≤0.5 0.3-0.6 0.010 0.020 8.50-9.50 0.30-0.60 0.15-0.25   0.001-0.006 1.50-2.00 ≤0.4 ≤0.4 0.04-0.09 0.03-0.07  
A 213 T122
SA-213 T122
0.07-0.14 ≤0.5 ≤0.70 0.010 0.020 10.00-12.50 0.25-0.60 0.15-0.30   0.0005-0.005 1.50-2.50 ≤0.5 ≤0.4 0.040-0.10 0.040-0.100  
TP304H 0.04-0.10 ≤0.75 ≤2.0 0.030 0.040 18.00-20.00           8.00-11.000        
TP321H 0.04-0.10 ≤0.75 ≤2.0 0.030 0.040 17.00-20.00     4*C%-0.60     9.00-13.00        
TP347H 0.04-0.10 ≤0.75 ≤2.0 0.030 0.040 17.00-20.00           9.00-13.00       Nb+Ta≥8*C%-1.00
S30432 0.07-0.13 ≤0.30 ≤1.0 0.040 0.010 17.00-20.00       0.001-0.010   7.5-10.5 0.003-0.030 0.30-0.60 0.05-0.12 Cu 2.50-3.50
TP310HCbN 0.04-0.10 ≤0.75 ≤2.0 0.030 0.030 24.00-26.00           17.0-23.0   0.20-0.60 0.15-0.35  
EN10216-2 P195GH ≤0.13 ≤0.35 ≤0.70 0.020 0.025 ≤0.30 ≤0.08 ≤0.02 ≤0.040     ≤0.30 ≥0.02 ≤0.01   Cr+Cu+Mo+Ni≤ 0.70
P235GH ≤0.16 ≤0.35 ≤1.20 0.020 0.025 ≤0.30 ≤0.08 ≤0.02 ≤0.040     ≤0.30 ≥0.02 ≤0.01   Cr+Cu+Mo+Ni≤ 0.70
P265GH ≤0.20 ≤0.40 ≤1.40 0.020 0.025 ≤0.30 ≤0.08 ≤0.02 ≤0.040     ≤0.30 ≥0.02 ≤0.01   Cr+Cu+Mo+Ni≤ 0.70
16Mo3 0.12-0.20 ≤0.35 0.40-0.90 0.020 0.025 ≤0.30 0.25-0.35         ≤0.30 ≤0.04     Cu≤ 0.30
10CrMo5-5 ≤0.15 0.50-1.00 0.30-0.60 0.020 0.025 1.00-1.50 0.45-0.65         ≤0.30 ≤0.04     Cu≤ 0.30
13CrMo4-5 0.10-0.70 ≤0.35 0.40-0.70 0.020 0.025 0.70-1.15 0.40-0.60         ≤0.30 ≤0.04     Cu≤ 0.30
10CrMo9-10 0.08-0.14 ≤0.50 0.30-0.70 0.020 0.025 2.00-2.50 0.90-1.10         ≤0.30 ≤0.04     Cu≤ 0.30
7CrMoVTiB10-10 0.05-0.10 0.15-0.45 0.30-0.70 0.010 0.020 2.20-2.60 0.90-1.10 0.20-0.30 0.06-0.10 0.0015-0.0007     ≤0.02   ≤0.010  
X10CrMoVNb9-1 0.08-0.12 0.20-0.50 0.30-0.60 0.010 0.020 8.00-9.50 0.85-1.05 0.18-0.25       ≤0.04 ≤0.04 0.06-0.10 0.03-0.07 Cu≤ 0.30
X10CrWMoVNb9-2 0.07-0.13 ≤0.50 0.30-0.60 0.010 0.020 8.50-9.50 0.30-0.60 0.15-0.25   0.001-0.006 1.50-2.00 ≤0.04 ≤0.02 0.04-0.09 0.03-0.07  
JIS G3461 STB 340 ≤0.18 ≤0.35 0.30-0.60 0.020 0.025                      
STB 410 ≤0.32 ≤0.35 0.30-0.80 0.020 0.025                      
STB 510 ≤0.25 ≤0.35 1.00-1.50 0.020 0.025                      
JIS G3462 STAB 12 0.10-0.20 0.10-0.50 0.30-0.80 0.020 0.025   0.45-0.65                  
STAB 13 0.15-0.25 0.10-0.50 0.30-0.80 0.020 0.025   0.45-0.65                  
STAB 20 0.10-0.20 0.10-0.50 0.30-0.80 0.020 0.025   0.45-0.65                  
STAB 22 ≤0.15 ≤0.50 0.30-0.60 0.020 0.025 0.80-1.25 0.45-0.65                  
STAB 23 ≤0.15 0.50-1.00 0.30-0.60 0.020 0.025 1.00-1.25 0.45-0.65                  
STAB 24 ≤0.15 ≤0.50 0.30-0.60 0.020 0.025 1.90-2.60 0.87-1.13                  
STAB 26 ≤0.15 0.25-1.00 0.30-0.60 0.020 0.025 8.00-10.0 0.90-1.10                  
JIS G3463 SUS304HTB 0.04-0.10 ≤2.00 ≤0.75 0.020 0.025 18.00-20.00           8.00-11.000        
SUS321HTB 0.04-0.10 ≤2.00 ≤0.75 0.020 0.025 17.00-20.00     4*C%-0.60     9.00-13.00        
GB 13296 0Cr18Ni9 0.07 ≤1.00 ≤2.00 0.030 0.035 17.00-19.00           8.00-11.00        
1Cr18Ni9 ≤0.15 ≤1.00 ≤2.00 0.030 0.035 17.00-19.00           8.00-11.00        
00Cr19Ni10 ≤0.03 ≤1.00 ≤2.00 0.030 0.035 18.00-20.00           8.00-12.00        
2Cr23Ni13 ≤0.20 ≤1.00 ≤2.00 0.030 0.035 22.00-24.00           12.00-15.00        
0Cr23Ni13 ≤0.08 ≤1.00 ≤2.00 0.030 0.035 22.00-24.00           12.00-15.00        
2Cr25Ni20 ≤0.25 ≤1.00 ≤2.00 0.030 0.035 22.00-24.00           19.00-22.00        
0Cr25Ni20 ≤0.08 ≤1.00 ≤2.00 0.030 0.035 24.00-26.00           19.00-22.00        
0Cr17Ni12Mo2 ≤0.08 ≤1.00 ≤2.00 0.030 0.035 16.00-18.50 2.00-3.00         10.00-14.00        
1Cr17Ni12Mo2 0.04-0.1 ≤0.75 ≤2.00 0.030 0.035 16.00-18.00 2.00-3.00         11.00-14.00        
00Cr17Ni14Mo2 ≤0.03 ≤1.00 ≤2.00 0.030 0.035 16.00-18.00 2.00-3.00         12.00-15.00        
0Cr19Ni13Mo3 ≤0.08 ≤1.00 ≤2.00 0.030 0.035 18.00-20.00 3.00-4.00         11.00-15.00        
00Cr19Ni13Mo3 ≤0.03 ≤1.00 ≤2.00 0.030 0.035 18.00-20.00 3.00-4.00         11.00-15.00        
1Cr18Ni9Ti 0.04-0.1 ≤1.00 ≤2.00 0.030 0.035 17.00-19.00     5*(C-0.02)-0.80     8.00-11.00        
0Cr18Ni10Ti ≤0.08 ≤1.00 ≤2.00 0.030 0.035 17.00-19.00     ≥5*C     9.00-12.00        
1Cr18Ni11Ti 0.04-0.1 ≤1.00 ≤2.00 0.030 0.035 17.00-20.00     4*C-0.60     9.00-13.00        
0Cr18Ni11Nb ≤0.08 ≤1.00 ≤2.00 0.030 0.035 17.00-19.00           9.00-13.00        
1Cr19Ni11Nb 0.04-0.1 ≤1.00 ≤2.00 0.030 0.035 17.00-20.00           9.00-13.00        
0Cr18ni13Si4 ≤0.08 ≤1.00 ≤2.00 0.030 0.035 15.00-20.00           11.00-15.00        
0Cr18Ni12Mo2Ti ≤0.08 ≤1.00 ≤2.00 0.030 0.035 16.00-19.00 1.80-2.50   5*C-0.70     11.00-14.00        
1Cr18Ni12Mo2Ti ≤0.12 ≤1.00 ≤2.00 0.030 0.035 16.00-19.00 1.80-2.50   5*(C-0.02)-0.80     11.00-14.00        
1Cr18Ni12Mo3Ti ≤0.12 ≤1.00 ≤2.00 0.030 0.035 16.00-19.00 2.50-3.50   5*(C-0.02)-0.80     11.00-14.00        
0Cr18Ni12Mo3Ti ≤0.08 ≤1.00 ≤2.00 0.030 0.035 16.00-19.00 2.50-3.50   5*C-0.70     11.00-14.00        

Mechanical properties:

Mechanical properties are physical properties that a material exhibits upon the application of forces.

Standard Grade Tensile strength
(Mpa)
Yield point(Mpa)
not less than
Elongation(%)
not less than
Impact(J)
not less than
Hardness
not less than
GB 3087 10 335-475 205(T<16mm)
195(t≥16mm)
24 " "
20 392-588 245(T<16mm)
235(t≥16mm)
20 " "
DIN 17175 St35.8 360-480 235(T<16mm)
225(t≥16mm)
25 " "
St45.8 410-530 255(T<16mm)
245(t≥16mm)
21 " "
15Mo3 456-600 270 22 " "
13CrMo44 440-590 290 22 " "
10CrMo910 450-600 280 20 " "
14MoV63 460-610 320 20 55 "
12Cr1MoV 470-640 255 21 41 "
GB/T 9948 10 335-475 205 25 40  
20 410-550 245 24 40  
12CrMo 410-560 205 21 40 156HBW
15CrMo 440-640 295 21 40 170HBW
12Cr1Mo 415-560 205 22 40 163HBW
12Cr1MoV 470-640 255 21 40 179HBW
12Cr2Mo 450-600 280 22 40 163HBW
12Cr5Mol 415-590 205 22 40 163HBW
12Cr5MONT 480-640 280 20 40  
12Cr9Mol 460-640 210 20 40 179HBW
12Cr9MoNT 590-740 390 18 40  
GB/T 6479 10   ≤16mm 205
>16mm-40mm 195
>40mm 185
24 40  
20   ≤16mm 245
>16mm-40mm 235
>40mm 225
24 41  
12CrMo   ≤16mm 205
>16mm-40mm 195
>40mm 185
21 42  
15CrMo   ≤16mm 295
>16mm-40mm 285
>40mm 275
21 43  
12Cr2Mo   280 20 44  
12Cr5Mo   ≤16mm 195
>16mm-40mm 185
>40mm 175
22 45  
Q345B/C/D/E   ≤16mm 345
>16mm-40mm 335
>40mm 325
21 46  
GB 5310 20G 410-550 245 24 40/27 120-160HBW
25MnG 485-640 275 20 40/27 130-180HBW
15MoG 450-600 270 22 40/27 125-180HBW
20MoG 415-665 220 22 40/27 125-180HBW
15CrMoG 440-640 295 21 40 125-170HWB
12Cr2MoG 450-600 205 22 40/27 125-180HBW
12 Cr1MoVG 470-640 280 21 40/27 135-195HBW
12Cr2MoWVTiB 540-735 255 18 40/27 160-220HBW
10Cr9Mo1VNb ≥585 345 20 40 185-250HBW
10Cr9MoW2VNbBN ≥620 415 20   185-250HBW
             
ASTM A106
ASME SA-106M
A106B/SA-106B ≥415 240 30 " "
A 106C/SA-106C ≥485 275 30 "  
ASTM A192
ASME SA-192M
A192/SA-192 ≥325 180 35 " 77HRB(137HB)
ASTM A209
ASME SA-209M
A 209T1/SA-209 T1 ≥380 205   " 80HRB
A 209T1b/SA-209T1b ≥365 195   " 77HRB
A209T1a/SA-209T1a ≥415 220   " 81HRB
ASTM A210
ASME SA-210M
A210 A1/ SA-210A1 ≥415 255   " 79HRB
A210C/ SA-210C ≥485 275   " 89HRB
ASTM A213
ASME SA-213M
A213 T2/SA213 T2 ≥415 205   " 85HRB
A213 T11/SA213 T11 ≥415 205   " 85HRB
A213 T22/SA213 T22 ≥415 205   " 85HRB
A213 T23/SA213 T23 ≥510 400 20 " 97HRB
A213 T24/SA213 T24 ≥585 415 20 " 25HRB
A213 T91/SA213 T91 ≥585 415 20 " 25HRB
A213 T911/SA213 T911 ≥620 440 20 " 25HRB
A213 T22/SA213 T92 ≥620 440 20 " 25HRB
A213 T122/SA213 T122 ≥620 400 20   25HRB
TP304H ≥515 205 35   90HRB
TP316H ≥515 205 35   90HRB
TP321H ≥515 205 35   90HRB
TP347H ≥515 205 35   90HRB
S30432 ≥590 235 35   95HRB
TP310HCbN ≥655 295 30   100HRB
ASME SA-335M
ASTM A 335M
SA-335 P2 ≥380 205      
SA-335 P5 ≥415 205      
SA-335 P9 ≥415 205      
SA-335 P11 ≥415 205      
SA-335 P22 ≥415 205      
SA-335 P23 ≥510 400      
SA-335 P24 ≥585 415      
SA-335 P91 ≥585 415      
SA-335 P92 ≥620 440      
EN 10216-2 P195GH 320-440 195 27    
P235GH 360-500 235 25    
P265GH 410-570 265 23    
16Mo3 450-600 280 22    
10CrMo5-5 410-560 275 22    
13CrMo4-5 440-590 290 22    
10CrMo9-10 480-630 280 22    
X10CrMoVBb9-1 630-830 450 19 41  
JIS G 3461 STB 340 ≥340 175 35    
STB 410 ≥410 255 25    
STB 510 ≥510 295 25    
JIS G 3462 STBA 12 ≥382 175 35    
STBA 13 ≥412 255 25    
STBA 20 ≥412 295 25    
STBA 22 ≥412 206      
STBA 23 ≥412 206      
STBA 24 ≥412 206      
STBA 26 ≥412 206      
STBA 19 ≥412 206      
JIS G 3463 SUS 304HTB ≥520 206      
SUS 316HTB ≥520 206      
SUS 321HTB ≥520 206      
SUS 347HIB ≥520 206      
GB 13296 0Cr18Ni9 ≥520 205 35    
1Cr18Ni9 ≥520 205 35    
00Cr19Ni10 ≥480 175 35    
2Cr23Ni13 ≥520 205 35    
0Cr23Ni13 ≥520 205 35    
2Cr25Ni20 ≥520 205 35    
0Cr25Ni20 ≥520 205 35    
0Cr17Ni12Mo2 ≥520 205 35    
1Cr17Ni12Mo2 ≥520 205 35    
00Cr17Ni14Mo2 ≥480 175 40    
0Cr19Ni13Mo3 ≥520 205 35    
00Cr19Ni13Mo3 ≥480 175 35    
1Cr18Ni9Ti ≥520 205 40    
0Cr18Ni10Ti ≥520 205 35    
1Cr18Ni11Ti ≥520 205 35    
0Cr18Ni11Nb ≥520 205 35    
1Cr19Ni11Nb ≥520 205 35    
0Cr18ni13Si4 ≥520 205 35    
0Cr18Ni12Mo2Ti ≥530 205 35    
1Cr18Ni12Mo2Ti ≥540 215 35    
1Cr18Ni12Mo3Ti ≥530 205 35    
0Cr18Ni12Mo3Ti ≥540 215 35    

 

Pipe for chemical equipment

Implement GB 9948, GB 6479 for seamless steel tube & pipe used for pressure pipes such as petroleum and chemical furnaces, refineries, crackers, hydrogen units, heat exchangers etc.

Seamless steel pipes for petroleum cracking GB 9948
Seamless steel pipes for petroleum cracking GB 9948
Usage Steel Grade Specification
Pipe used for Petroleum Cracking 20, 12CrMo, 15CrMo, 12Cr2Mo, 12Cr1MoV, GB 9948
12Cr5MoI, 12Cr5MoNT, 12Cr9MoI, 12Cr9MoNT,
Pipe used for High Pressure 20, Q345B, Q345C, Q345D, Q345E, 12CrMo, GB 6479
Chemical Fertilizer Equipment 15CrMo, 12Cr2Mo, 12Cr5Mo, 10MoWVNb

Mechanical properties for GB 9948 Seamless steel pipe

Standard Gade tensile strength (MPa) yield strength (MPa) elongation (%) impact energy (J) Brinell hardness (HB) delivery status
GB9948 10 330-490 ≥205 ≥24 / / Normalizing
20 410-550 ≥245 ≥21 ≥39 / Normalizing
15CrMo 440-640 ≥235 ≥21 ≥47 ≤170 Normalizing + tempering
1Cr2Mo ≥390 ≥175 ≥22 ≥92 ≤179 Normalizing + tempering
1Cr5Mo ≥390 ≥195 ≥22 ≥92 ≤187 annealing

Chemical composition for GB 9948 Seamless steel pipe

Gade C Si Mn P S Cr Mo Ni
10 0.07-0.14 0.17-0.37 0.35-0.65 ≤0.035 ≤0.035 ≤0.15 / ≤0.25
20 0.17-0.24 0.17-0.37 0.35-0.65 ≤0.035 ≤0.035 ≤0.25 / ≤0.25
15CrMo 0.12-0.18 0.17-0.37 0.40-0.70 ≤0.035 ≤0.035 0.80-1.10 0.40-0.55 ≤0.30
1Cr2Mo ≤0.15 0.50-1.00 0.30-0.60 ≤0.035 ≤0.030 2.15-2.85 0.45-0.65 /
1Cr5Mo ≤0.15 ≤0.50 ≤0.60 ≤0.035 ≤0.030 4.00-6.00 0.45-0.60 ≤0.60

General GB 9948 seamless steel pipe use temperature below 450 ° C, domestic pipe is mainly made of 10, 20 carbon steel hot-rolled pipe or cold drawn pipe.

Chemical Component of GB6479-2013

Chemical Component/%  
Grade C Si Mn Cr Mo V W Nb Ni P S
                  No More Than
10 0. 07-0. 13 0. 17 -0. 37 0.35 -0. 65 - - - - - - 0.025 0.015
20 0. 17 -0. 23 0.17 -0. 37 0. 35-0.65 - - - - - - 0.025 0.015
Q345Ba 0. 12 -0. 20 0.20-0. 50 1.20-1.70 <0. 30 <0. 10 Mis - <0.07 W0. 50 0.025 0.015
Q345C" 0. 12 -0. 20 0.20 -0. 50 1.20 -1. 70 W0. 30 <0. 10 <0. 15 - W0.07 <0. 50 0.025 0.015
Q345D" 0. 12 -0. 18 0.20 -0. 50 1. 20-1.70 W0. 30 <0. 10 <0. 15 - W0.07 <0. 50 0. 025 0.015
Q345Ea*B 0. 12 -0. 18 0. 20-0. 50 1. 20 -1.70 W0. 30 <0. 10 <0. 15 - <0.07 <0. 50 0. 025 0.01
12CrMo 0. 08-0. 15 0.17 -0. 37 0. 40-0. 70 0. 40-0. 70 0. 40-0. 55 - - - - 0. 025 0.015
15CrMo 0. 12 -0. 18 0. 17 -0. 37 0. 40-0. 70 0. 80-1. 10 0. 40-0.55 - - - - 0. 025 0. 015
12Cr2Mo 0. 08-0. 15 <0. 50 0. 40-0.6 2.00-2. 50 0. 90-1. 13 - - - - 0.025 0. 015
12Cr5Mo <0. 15 <0.50 <0. 60 4. 00-6.00 0. 40-0. 60 - - - <0. 60 0. 025 0. 015
LOMoWVNb 0. 07-0. 13 0. 50-0.8 0. 50-0.8 - 0. 60-0. 90 0. 30-0. 50 0. 50-0. 90 0. 06-0. 12 - 0.025 0.015
12SiMoVNb 0.08 -0. 14 0.50 -0.8 0. 60-0. 90 - 0. 90-1. 10 0. 30-0. 50 - 0. 04-0.08 - 0.025 0.015

Awhen It Is Necessary To Add Fine Grain Elements, The Steel Shall Contain At Least One Of Al, Nb, V And Ti. The Added Fine Grain Elements Shall Be Indicated In The Quality Certificate. Ti Content Shall Not Be More Than 0.20%

BAl Content In Steel Shall Not Be Less Than 0.020%, Or Ala Content In Steel Shall Not Be Less Than 0.015%

Mechanical Property of GB6479-2013

Mechanical Property
Grade Tensile Yield Elong After Fracture A/% Reduction Of Area Shork Absorption Energy
MPa MPa Z/% (KV2)/J
  Steel Tube Wall Thickness/Mm   Test Temperature/℃ Portrait Transver
  W16 >16 — 40 >40 Portrait Transver  
  Not Less Than Not Less Than
10 335-490 205 195 185 24 22
20 410-550 245 235 225 24 22 0 40 27
Q345B 490-670 345 335 325 21 19 20 40 27
Q345C 490-670 345 335 325 21 19 0 40 27
Q345D 490-670 345 335 325 21 19 -20 40 27
Q345E 490-670 345 335 325 21 19 -40 40 27
12CrMo 410-560 205 195 185 21 19 20 40 27
15CrMo 440-640 295 285 275 21 19 20 40 27
12Cr2Moa 450-600 280 20 18 20 40 27
12Cr5Mo 390-590 195 185 175 22 20 20 40 27
LOMoWVNb 470-670 295 285 275 19 17 20 40 27
12SiMoVNb 2470 315 305 295 19 17 50 20 40 27

Test requirement

In addition to ensuring the chemical composition and mechanical properties, the steel pipe directly rolled by ingot shall be subject to low power inspection, and eddy current inspection.


Pipe for Boiler products

Implement the relevant specifications such as GB3087, GB/T 5310, DIN17175, EN10216, ASME SA-106M, ASME SA192M, ASME SA209M, ASME SA -210M, ASME SA -213M, ASME SA -335M, JIS G 3456, JIS G 3461, JIS G 3462 and so on. Products will be used for the heating surface of high temperature boiler, economizer, header, superheater, reheater and for petrochemical industry etc.

Usage Specification Steel Grade
Seamless Steel Tube for High Pressure Boiler GB/T 5310 20G, 25MnG, 15MoG, 15CrMoG, 12Cr1MoVG,
12Cr2MoG, 15Ni1MnMoNbCu, 10Cr9Mo1VNbN
High Temperature Seamless Carbon Steel Nominal Pipe ASME SA-106/ B, C
SA-106M
Seamless Carbon Steel Boil Pipe used for High Pressure ASME SA-192/ A192
SA-192M
Seamless Carbon Molybdenum Alloy Pipe used for Boiler and Superheater ASME SA-209/ T1, T1a, T1b
SA-209M
Seamless Medium Carbon Steel Tube & Pipe used for Boiler and Superheater ASME SA-210/ A-1, C
SA -210M
Seamless Ferrite and Austenite Alloy Steel Pipe used for Boiler, Superheater and Heat Exchanger ASME SA-213/ T2, T5, T11, T12, T22, T91
SA-213M
Seamless Ferrite Alloy Nominal Steel Pipe applied for High Temperature ASME SA-335/ P2, P5, P11, P12, P22, P36, P9, P91, P92
SA-335M
Seamless Steel Pipe made by Heat-resistant Steel DIN 17175 St35.8, St45.8, 15Mo3, 13CrMo44, 10CrMo910
Seamless Steel Pipe for EN 10216 P195GH, P235GH, P265GH, 13CrMo4-5, 10CrMo9-10, 15NiCuMoNb5-6-4, X10CrMoVNb9-1
Pressure Application

Products can be ordered in accordance with the client’s requirements.


Pipe for nuclear power station

Implement standards or specifications including GB 24512.1, GB 24512.1, RCCM series, ASME series. We are capable of producing Grade 2 and Grade 3 steel pipe with OD less than or equal to 273mm, which are used for the main steam pipeline and main water-supply pipeline with common sizes. Products can be ordered in accordance with the client’s requirements.

Nuclear power plant
Nuclear power plant
Usage Size Steel Grade Specification Typical Application
OD(mm) WT(mm)
Seamless Steel Pipe used for Nuclear Power Station 48 - 720 4.5 - 130 HD245, HD245Cr GB 24512.1 Carbon and alloy seamless steel pipe for Nuclear Station Island and Conventional Island
HD265, HD265Cr GB 24512.2
HD280, HD280Cr  
HD12Cr2Mo  
HD15Ni1MnMoNbCu  
TUE250B RCC-M
TU42C
TU48C
P280GH
SA106B/C ASME SA-106/SA-106M
P11 ASME SA-335/SA-335M
P22
P36
P91

Nuclear power is a technology which extracts usable energy from atomic nuclei via controlled nuclear reactions – normally atomic fission.

GB24512.1 seamless tubes and pipes for nuclear power plant.

Chemical Composition of GB24512.1

Grade C Si Mn P S Cr Mo Ni Sn Cu
HD245 ≤0.22 0.15-0.39 ≤1.04 ≤0.025 ≤0.02 ≤0.25 ≤0.15 ≤0.25 ≤0.030 ≤0.20
HD245Cr ≤0.22 0.15-0.39 ≤1.04 ≤0.025 ≤0.02 0.18-0.33 ≤0.15 ≤0.25 ≤0.030 ≤0.20
HD265 ≤0.22 ≤0.44 ≤1.44 ≤0.025 ≤0.02 ≤0.3 ≤0.08 ≤0.3 ≤0.030 ≤0.20
HD265Cr ≤0.22 ≤0.44 ≤1.44 ≤0.025 ≤0.02 0.15~0.3 ≤0.08 ≤0.3 ≤0.030 ≤0.20
HD280 ≤0.22 0.1-0.4 0.8-1.6 ≤0.025 ≤0.02 ≤0.25 ≤0.1 ≤0.5 ≤0.030 ≤0.20
HD280Cr ≤0.22 0.1-0.4 1.0-1.6 ≤0.025 ≤0.02 0.15-0.33 ≤0.1 ≤0.5 ≤0.030 ≤0.20

Mechanical Capacity of GB24512.1

Grade Tensile   Strength, [MPa] Yeild Strength,   [MPa] Elongation (%)
HD245 410-550 ≥245 ≥24
HD245Cr 410-550 ≥245 ≥24
HD265 410-570 ≥265 ≥23
HD265Cr 410-570 ≥265 ≥23
HD280 410-590 ≥275 ≥21
HD280Cr 410-590 ≥275 ≥21
GB24512.2 are alloy steel seamless tubes and pipes for power plant.

Chemical Composition of GB24512.2

Grade C Si Mn P S Cr Mo Ni Nb N Cu V
HD12Cr2Mo 0.07-0.16 ≤0.54 0.37-0.73 ≤0.03 ≤0.02 1.9-2.6 0.86-1.24 ≤0.30 - - ≤0.20 ≤0.08
HD15Ni1MnMoNbCu 0.09-0.18 0.21-0.54 0.76-1.24 ≤0.030 ≤0.020 0.14-0.35 0.21-0.44 0.95-1.35 0.010-0.030 ≤0.020 0.45-0.85 ≤0.02

Mechanical Capacity of GB24512.2

Grade Tensile   Strength, [MPa] Yeild Strength,   [MPa] Elongation (%)
HD12Cr2Mo 450-600 ≥280 ≥22
HD15Ni1MnMoNbCu 620-780 ≥440 ≥19
RCC-M steel pipe for nuclear industry equipment.

Chemical Composition of RCC-M

Grade C Si Mn P S Cr Mo Ni Al Ceq Cu Sn
TU48C ≤0.24 0.09-0.40 0.60-1.30 ≤0.040 ≤0.040 - - - - - ≤0.25 ≤0.030
P280GH ≤0.22 0.10-0.40 0.80-1.60 ≤0.025 ≤0.020 ≤0.25 ≤0.10 ≤0.50 0.020-0.050 ≤0.48 ≤0.25 ≤0.030

Mechanical Capacity of RCC-M

Grade Tensile Strength, [MPa] Yeild Strength, [MPa] Elongation (%)
TU48C 470-570 ≥275 Rm(A-2)≥10500
P280GH 470-570 ≥275 Rm(A-2)≥10500

The process takes place in a nuclear-fuelled power plant, where – much like in a fossil-fuelled power plant – water is turned into steam, which drives turbine generators to produce electricity. The difference between the two power plants is the heat source. Nuclear power produces electricity by splitting uranium atoms which generate phenomenal heat. This is called fission. This heat is used to create the steam which powers the generators. There is no combustion in a nuclear reactor, just the constant splitting of atoms which produces manageable heat.

Either a pressurised water reactor or boiling water reactor is used, but regardless which type of reactor is used to generate heat, the conditions under which they do are extremely hostile. This means that the finest Stainless Steel pipes and tubing are required so that they can deal with constantly high pressures and temperatures.


Steel pipe for gas cylinder

Gas cylinder steel pipe is used in manufacturing seamless steel gas cylinders, automotive CNG cylinders and composite cylinders. It provides excellent hot rolled thin-walled seamless steel pipe for tube-type bottle. This high-pressure gas cylinder pipe has such features: quality inside and outside surface; uniform wall thickness; light mass; high productivity and yield and low cost, etc.

Implement specifications GB 18248, GB28884 and JIS 3429. Products are used for the manufacture of firefighting gas cylinder, industrial gas cylinder and vehicle-borne gas cylinder. Products can be ordered in accordance with the client’s requirements. It has been applied in seamless tube-type bottle bottom closing in key technology, adopting the gas cylinder pipe manufacture from punching drawing billet to thin-walled seamless steel pipe production. And this change is welcomed by users and has been an trend.

Usage Specification No. Steel Grade
Seamless Steel Pipe used for Gas Cylinder GB /T18248 37Mn, 34CrMo4, 35CrMo,
30CrMnSiA, 30CrMo
Fire-fighting gas cylinders, industrial gas cylinders, vehicle gas cylinders JIS G3429 37Mn, 34Mn2V, 30CrMo, 35CrMo, STH11, STH12, STH21, STH22, or anything else
Seamless Steel Pipe used for Gas Cylinder with Large Volume GB/T28884 30CrMoE(4130X), 32CrMoE(4142)

Products can be ordered in accordance with the client’s requirements.

30CrMoE seamless tubes are used for manufacturing seamless steel tubes for gas cylinders with a capacity of 300L~3 000L.

Chemical Component of 30CrMoE:

Grade   C Si Mn P S Cr Mo Ni Cu
30CrMoE 1 0.25-0.35 0.15-0.35 0.4-0.9 ≤0.02 ≤0.01 0.8-1.1 0.15-0.25 ≤0.3 ≤0.2
2 0.26-0.34 0.17-0.37 0.4-0.7 ≤0.02 ≤0.01 0.8-1.1 0.15-0.25 ≤0.3 ≤0.2

*30CrMoE 1 is equal to 4130X.

Mechanical property of 30CrMoE:

30CrMoE T.S/MPa Y.S/MPa E/A % Yield Ratio Hardness/HBW -40℃ Impact Test/J
≥720 ≥485 ≥20 ≤86 ≤269 ≥32

NDT: UT 100%.

JIS G3429 Seamless tubes for high pressure gas cylinder

Chemical Component of JIS G3429:

Grade C Si Mn P S Ni Cr Mo
STH11 ≤0.50 0.10-0.35 ≤1.80 ≤0.035 ≤0.035 / / /
STH12 0.30-0.41 0.10-0.35 1.35-1.70 ≤0.030 ≤0.030 / / /
STH21 0.25-0.35 0.15-0.35 0.40-0.90 ≤0.030 ≤0.030 ≤0.25 0.80-1.20 0.15-0.30
STH22 0.33-0.38 0.15-0.35 0.40-0.90 ≤0.030 ≤0.030 ≤0.25 0.80-1.20 0.15-0.30

Pipe for cryogenic device

Cryogenic piping refers to systems that are used in a wide range of industrial applications that require extremely low temperatures, generally around -300°F (150°C) or lower. Due to such low temperatures, cryogenic pipes face unique corrosion and deterioration challenges.

Cyrogenic piping is also referred to as cold piping.

Implement specifications such as ASME SA-333M, GB/T18984. The seamless steel tubes are applied for low temperature pressure vessel pipeline and low temperature heat exchanger pipeline.

Usage Specification Steel Grade
Seamless and Welding Nominal Pipe used for Low Temperature ASME SA -333M Gr.3, Gr.6, Gr.8 and so on
Seamless Steel Pipe used for Low Temperature Pipeline GB/T18984 16MnDG, 06Ni3MoDG, 06Ni9MoDG and so on
ASTM A333 (ASME S/A-333) Pipe grades permit low temperature service.

 Mechanical requiremnts of ASTM A333 alloy pipe

Grade Tensile Strength (MPa) Yield Point (MPa) Elongation (%)
Y X
Grade 3 ≥450 ≥240 ≥30 ≥20
Grade 6 ≥415 ≥240 ≥30 ≥16.5
Grade 8 ≥690 ≥515 ≥22

 Chemical Composition (%) of ASTM A333 steel pipe

Grade Chemical Composition (%)
C Si Mn P S Cr Ni Cu Mo V Al
Grade 3 ≤0.19 0.18-0.37 0.31-0.64 ≤0.025 ≤0.025 3.18-3.82
Grade 6 ≤0.30 ≥0.10 0.29-1.06 ≤0.025 ≤0.025
Grade 8 ≤0.13 0.13-0.32 ≤0.90 ≤0.025 ≤0.025 8.40-9.60

Products can be ordered in accordance with the client’s requirements.

GB/T18984-2003 standard suitable for -49 to -148 0 F cryogenic pressure vessel piping, and low-temperature heat exchanger tubes seamless steel pipe.

Chemical Compositions(%)

Grade C Si Mn P(max) S Ni Mo V
16MnDG 0.12-0.20 0.20-0.55 1.20-1.60 0.025 0.025  -  -  -
10MnDG <=0.13 0.17-0.37 <=1.35 0.025 0.025  -  - <=0.07
09DG <=0.12 0.17-0.37 <=0.95 0.025 0.025  -  - <=0.07
09Mn2VDG <=0.12 0.17-0.37 <=1.85 0.025 0.025  -  - <=0.12
06Ni3MoDG <=0.08 0.17-0.37 <=0.85 0.025 0.025 2.5-3.7 0.15-0.30 <=0.05

Longitudinal mechanical properties of the steel pipes

Grade Tensile strength Lower yield strength(Rcl/Mpa) Elongation
Rm/Mpa W.T.<=16mm W.T.>16mm A/%
16MnDG 490-665 >=325 >=315 >=30
10MnDG >=400 >=240 >=35
09DG >=385 >=210 >=35
09Mn2VDG >=450 >=300 >=30
06Ni3MoDG >=455 >=250 >=30

(Not more than 25 mm) outside diameter and wall thickness of the steel pipe shall conform to GB/T 17395-1998 Table 1 provisions. According to the requirements of the demand side, the supply and demand sides consultation, produce the provisions specifications steel pipe.


Pipe for mechanical engineering

Pipes used for petroleum mechanical processing are the necessary materials for oil exploration equipment, well-drilling equipment, machinery oil recovery equipment, facilities and accessories for oil drilling & recovery as well as integrated equipment of petroleum & natural gas collection and transmission.

Our manufactory has successfully developed petroleum mechanical processing pipe with steel grade 55ksi-135ksi on its own, which has both good strength and good tenacity, uniform performance of whole wall thickness and excellent processing performance.

Production Range

  • OD: 42mm-760mm
  • WT: 4mm-120mm

Steel Grade and Properties

Applicable specification: API 5CT, ASTM A519, NACE MR0175, GB/T 8162 or user’s agreement.

Properties of Steel Pipe
Steel grade Yield Tensile Elongation Hardness Absorbed-energy
(MPa) (Mpa) (%) (HRC) (AKV2/J)
55ksi 379-552 ≥ 655 ≥16 Implement  in accordance with API 5CT Specification
80ksi 552-655 ≥ 655 ≥ 16 ≤ 23.0HRC
95ksi 655-758 ≥ 724 ≥ 15 ≤ 25.4HRC
110ksi 758-965 ≥ 862 ≥ 13 28-34 HRC
125ksi 862-1034 ≥ 931 ≥ 12 28-36 HRC
135ksi 931-1068 ≥ 931 ≥ 12 28-38 HRC

Remarks:

  • Property requirements for steel grade of 4130, 4140, 42CrMo shall be negotiated by both parties.
  • Supply steel pipe with the relevant properties required by the clients.

Note: Steel pipe can be developed and produced to meet the users’ personalized requirements according to their demands.

Application Fields

Petroleum mechanical processing pipe can be applied to machining accessories for well drilling and well completion tools, power drilling tools used under the well,suspension sealing & isolation systems,wellhead system devices and other oil-field service products.

NACE MR0175, is titled Petroleum and natural gas industries — Materials for use in H2S-containing environments in oil and gas production. It was issued as a recommendation of threshold limits of H2S above which precautions against environmental cracking are considered necessary.


Wear-resistant pipe

Wear-resistant pipe has high dimensional precision, good controllability in hardenability. It can meet user's requirements of lightweight design, and a complete series of wear-resistant pipe products have taken shape.

Wear resistant pipe
Wear resistant pipe

Properties of Steel Pipe

Steel Grade Yield(MPa) Tensile Elongation Hardness
(Mpa) (%) (HRC)
45Mn2 HRC≥50
Hot rolling delivery, HRC should be more than or equal to 50 after heat treatment
HS-1 HRC≥55
Hot rolling delivery, HRC should be more than or equal to 55 after heat treatment
65Mn HRC≥58
Hot rolling delivery, HRC should be more than or equal to 58 after heat treatment
H65 HRC≥60
Hot rolling delivery, HRC should be more than or equal to 60 after heat treatment
NM50 ≥420 ≥750 ≥14% HRC≥50
HRC should be more than or equal to 50 after heat treatment
NM55 ≥450 ≥780 ≥13% HRC≥55
HRC should be more than or equal to 55 after heat treatment
NM60 ≥530 ≥880 ≥12% HRC≥60
HRC should be more than or equal to 60 after heat treatment
NM62 ≥550 ≥990 ≥12% HRC≥62
HRC should be more than or equal to 62 after heat treatment

Production Range

  • OD: 42mm-760mm
  • WT: 4mm-120mm

Steel Grade

Technical standard: GB/T 8162, GB/T 33966, GB/T 8163 or technical agreement.

Application Fields

It is widely applied in engineering machinery field, conveying solid materials (e.g. mud, coal, ore, sand, cement) by means of transmission media (such as liquid or gas).


Cold drawn cylinder pipe

Cylinder pipe are mainly applied in hydraulic driving equipment (including hydraulic and pneumatic steel cylinder, hydraulic support, oil-well pumping barrel, and etc.) used for the manufacturing of vehicle, engineering machinery, lifting and transportation machinery and other machinery. Liquid steel has high purity, excellent geometrical dimension and good performance for processing.

Cold drawn cylinder pipe
Cold drawn cylinder pipe
Properties of Steel Pipe
Steel Grade Tensile Yield Elongation Absorbed-energy
(MPa) (MPa) (%) (J)
Not Less Than
20 410 245 25
45 600 355 16 20℃(AKV2) 39
Q345B 470-630 345 20 20℃(AKV2) 34
Q345D 470-630 345 21 -20℃(AKV2) 34
25Mn 490 295 22 20℃(AKU2) 71
E355 490-650 355 21 -20℃(AKV2) 27
27SiMn 980 835 12 20℃(AKU2) 39
E470/20MnV6 650 470 17 -20℃(AKV2) 27

Production Range

  • O.D:42mm-760mm
  • WT: 4mm-120mm

Standard and Steel Grade

  • Technical standards related to material: GB/T699, GB/T3077, EN10210, EN10297.
  • Applicable technical standards for seamless pipe: GB/T8162, Q/OHAD032 or technical agreement.

High strength cylinder pipe

High strength cylinder pipe has high strength & tenacity, brittle fracture resistance and good weldability. S700 and S890 high strength cylinder pipes also have good hardenability and uniform performance after heat treatment. They are especially suitable for manufacturing high strength cylinders with large OD, medium & large wall thickness.

Application Fields

High strength cylinder pipe are mainly used for hydraulic support of coal collection face, hydraulic cylinder, engineering machinery, ship lock and offshore platform etc.

Production Range

  • OD: 42mm-760mm
  • WT: 4mm-120mm

Standard and Steel Grade

  • GB/T 8162
  • GB/T 8163
  • GB/T 17396 or technical agreement.
Requirements for Mechanical Properties
Steel Grade Delivery Condition Tensile Yield Elongation R.A. Absorbed-engergy
(MPa) (MPa) (%) (%) (J)
Not Less Than
27SiMn Quenching+Tempering 980 835 12 40 20℃(AKU2) 39
30CrMnSiA Quenching+Tempering 1080 835 10 35 20℃(AKU2) 39
30CrMoA Quenching+Tempering 930 735 12 50 20℃(AKU2) 71
20MnTiB Quenching+Tempering 1050 930 10 45 20℃(AKU2) 50
S700 Quenching+Tempering 750 650 14 40 -20℃(AKV2) 47
S890 Quenching+Tempering 810 700 14 35 -40℃(AKV2) 60
Seamless pipe is used for supply or transportation of water, oil, gas and other liquids under the specification of seamless pipe (GB / T8163-1999).

Mechanical Properties(%) of GB/T8163 steel pipe

Standard codes Models of steel tubes Tensite strength(MPa) Yield strength(MPa) Elongation(%)
GB/T8163 10 335-475 ≥205 ≥24
20 410-550 ≥245 ≥20
Q345 490-665 ≥325 ≥21

Chemical Composition(%) of GB/T8163 steel pipe

Standard codes Models of steel tubes Chemical compositions(%)
C Si Mn P S Cr Ni Cu
GB/T8163 10 0.07-0.14 0.17-0.37 0.35-0.65 ≤0.035 ≤0.035 ≤0.15 ≤0.25 ≤0.25
20 0.17-0.24 0.17-0.37 0.35-0.65 ≤0.035 ≤0.035 ≤0.25 ≤0.25 ≤0.25
Q345 0.12-0.20 0.20-0.55 1.20-1.60 ≤0.045 ≤0.045 / / /

Other Structural pipe

Structural Tubing is for high stress structural application like bridges, buildings, roll cages, and underwater platforms with wall thickness from 3/16" and up. It is often referred to as Hollow Structural Sections or just the acronym HSS.

Production Range

  • OD: 42mm-760mm
  • WT: 4mm-120mm

Standard and Steel Grade

  • GB/T 8162
  • GB/T 17396 or technical agreement.
Usage OD(mm) WT(mm) Steel Grade Standard/ Specification Aplication Fields 
Structural Pipe 42-760 4-120 20#,35#,45#,Q345A/B/C/D,Q390, Q420,25Mn,27SiMn etc. GB/T 8162 General structural and mechanical pipe
Vehicle Pipe 45-245 4-35 20Mn2,SAE1527,MZ410R, MZ530R,30Mn2,40Cr,45Mn2 etc. Technical agreement, YB/T5035 Pipe used for automobile axle and automobile semi-shaft
Mold Pipe &Tube DN200-DN1200   21CrMo10,21CrMo10-2 etc. Q/OHAD030, technical agreement Centrifugal graphite casting-iron pipe mold
Military Pipe 42-760 4-120 30Cr,40Cr,35CrNi1MoA etc. National military standard, agreement Pipe for military use
Geology Drilling Pipe &Tube 42-133 4-25 DZ40,DZ55,STM-R780,DZ60 etc. Q/OHAD006, GB/T 9808, agreement Drilling pipe
Hydraulic Support Pipe 42-760 4-120 20#,35#,45#,27SiMn,30MnNbRE, 30CrMnSi,30CrMnSiA etc. GB/T 17396, technical agreement Making hydraulic equipment for coal mine exploitation and hydraulic cylinder and piston for truck crane
Fluid Transmission Pipe & Tube 42-760 4-120 20#,Q345,Q390 etc. GB/T 8163, technical agreement Pipe & tube used for fluid transmission

Note: Steel pipe can be developed and produced to meet the users’ personalized requirements according to their demands.



Seamless pipe Specification, standard and identification

Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.