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Steel pipes applications
Applications
Steel pipes and fittings are ubiquitous and can be found underground and within residential walls, laboratories, and commercial and industrial structures.
Pipe & fittings Standards
Information about steel pipe and fitting codes, industrial standards of pipe fittings, pipe fitting standards, ASTM standards, DIN standards, JIS & GB standards.
Hot Piercing Workshop
Manufacturing process
Steel pipes and fittings are made by two different processes. The overall production method for both processes involves three steps.

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Our highly-skilled manpower is dedicated to producing the finest quality steel pipe, pipe fittings, meeting a wide variety of material specifications.


Tech & Service of Seamless pipe

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.

How to make seamless pipe(seamless pipe process)?
Hot Piercing Workshop
Piercing process
The cross roll piercing and pilger rolling process in the size range from approx. 250 to 660 mm outside diameter.
Precision cold drawn steel tube production process
Pipe weld cracks
often follow different mechanisms can be divided into two types of thermal cracking and cold cracking.
How to calculate a steel pipe and tube theoretic weight
Calculate a steel pipe?
Pipe fittings are necessary to join together pipes, or to change the direction of an existing pipe.
Pipe beveling
Pipe beveling is the process where an angle is formed between the edge of the end of a pipe or tube and a plane perpendicular to the surface.
Steel pipe cutting machine
Pipe cutting
Cutting tools have a grinding wheel piece cutting machine (also known as toothless saw), hand saw, cutter and other hand tools.
How to calculate a steel pipe and tube theoretic weight
Packing the steel pipes
There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method.
 
Condition on delivery:
Term Symbol Explanation
Cold-finished/hard
(cold-finished as-drawn)
BK No heat treatment after the last cold-forming process. The tubes therefore have only low deformability.
Cold-finished/soft
(lightly cold-worked)
BKW After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits.
Annealed GBK After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum.
Normalized NBK The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum.


Weled steel pipe specification, Standard and identification

Electrical resistance welding
Figure1

Welded steel pipe (steel pipe manufactured with a weld) is a tubular product made out of flat plates, known as skelp, that are formed, bent and prepared for welding.

Galvanized pipe process characteristics

What is Galvanized Steel Pipe? Galvanized steel can be made into a strong plumbing or tubing material -- one that resists corrosion from exposure to water or the elements. It has been used used for water-supply pipes or as a strong tubing for outdoor applications.

Hot dip galvanizing

More Products related to fittings:

Fitting specification, Standard and identification

There are different varieties of pipe fittings made of various materials and available in various shapes and sizes.

Standard we supply
ANSI
AWWA
ASME
DIN
Related stainless steel products
Austenitic stainless steel
Steel No. Standard No. Type Chemical composition Other
C Si S P Mn Cr Ni Mo Other ób ós δ5 HB
00Cr17Ni14Mo2 GB1220 Bar 0.03 1 0.03 0.035 2 16-18 12-15 2-3 480 177 40 187 ψ%:60
00Cr17Ni14Mo2 GB4237 Plate 0.03 1 0.03 0.035 2 16-18 12-15 2-3 480 177 40 187
00Cr17Ni14Mo2 GB/T14976 Pipe 0.03 1 0.03 0.035 2 16-18 12-15 2-3 480 175 35
00Cr19Ni10 GB1220 Bar 0.03 1 0.03 0.035 2 18-20 8-12 480 177 40 187 ψ%:60
00Cr19Ni10 GB4237 Plate 0.03 1 0.03 0.035 2 18-20 8-12 480 177 40 187
00Cr19Ni10 GB/T14976 Pipe 0.03 1 0.03 0.035 2 18-20 8-12 480 175 35
0Cr17Ni12Mo2 GB1220 Bar 0.8 1 0.03 0.035 2 16-18.5 10-14 2-3 520 205 40 187 ψ%:60
0Cr17Ni12Mo2 GB4237 Plate 0.8 1 0.03 0.035 2 16-18 10-14 2-3 520 205 40 187
0Cr17Ni12Mo2 GB/T14976 Pipe 0.8 1 0.03 0.035 2 16-18.5 10-14 2-3 520 205 35
0Cr18Ni9 GB1220 Bar 0.7 1 0.03 0.035 2 17-19 8-11 520 205 40 187 ψ%:60
0Cr18Ni9 GB4237 Plate 0.7 1 0.03 0.035 2 17-19 8-11 520 205 40 187
0Cr18Ni9 GB/T14976 Pipe 0.7 1 0.03 0.035 2 17-19 8-11 520 205 35
0Cr18Ni10Ti GB1220 Bar 0.8 1 0.03 0.035 2 17-19 9-12 Ti:5C 520 205 40 187 ψ%:50
0Cr18Ni10Ti GB4237 Plate 0.8 1 0.03 0.035 2 17-19 9-12 Ti:5C 520 205 40 187
0Cr18Ni10Ti GB/T14976 Pipe 0.8 1 0.03 0.035 2 17-19 9-12 Ti:5C 520 205 35
0Cr18Ni12Mo2Ti GB1220 Bar 0.8 1 0.03 0.035 2 16-19 11-14 1.8-2.5 Ti:5C-0.7 530 205 40 187 ψ%:55
0Cr18Ni12Mo2Ti GB4237 Plate 0.8 1 0.03 0.035 2 16-19 11-14 1.8-2.5 Ti:5C-0.7 530 205 37 187
0Cr18Ni12Mo2Ti GB/T14976 Pipe 0.8 1 0.03 0.035 2 16-19 11-14 1.8-2.5 Ti:5C-0.7 530 205 35
1Cr18Ni9 GB4237 Plate 0.15 1 0.03 0.035 2 17-19 8-10 520 205 40 187
1Cr18Ni9 GB5310 Pipe 0.15 1 0.03 0.035 2 17-19 8-10 Cu:0.2 520 205 35
0Cr25Ni20 GB1220 Bar 0.08 1 0.03 0.035 2 24-26 19-22 520 206 40 187
ASTM A312/A312M
Steel No. Type Chemical composition
C Si S P Mn Cr Ni Mo Other ób ós δ5 HB
TP304 0.08 0.75 0.03 0.04 2 18-20 8-11 515 205 35
TP304H 0.04-0.1 0.75 0.03 0.04 2 18-20 8-11 515 205 35
TP304L 0.035 0.75 0.03 0.04 2 18-20 8-13 485 170 35
TP316L 0.035 0.75 0.03 0.04 2 16-18 10-15 2-3 485 170 35
TP321 0.08 0.75 0.03 0.04 2 17-20 9-13 Ti:5C%-0.7 515 205 35
ASTM A312 Mechanical Property:
Steel Grade Heat Treatment Temperure Min. º F(º C) Tensile Strength Ksi (MPa), Min. Yield Strength Ksi (MPa), Min. Elongation %, Min
TP304 Solution 1900 (1040) 75(515) 30(205) 35
TP304L Solution 1900 (1040) 70(485) 25(170) 35
TP304H Solution 1900 (1040) 75(515) 30(205) 35
TP310S Solution 1900 (1040) 75(515) 30(205) 35
TP316 Solution 1900(1040) 75(515) 30(205) 35
TP316L Solution 1900(1040) 70(485) 25(170) 35
TP316H Solution 1900(1040) 75(515) 30(205) 35
TP316Ti Solution 1900(1040) 75(515) 30(205) 35
TP321 Solution 1900(1040) 75(515) 30(205) 35
TP321H Solution Cold: 2000(1100) Hot: 1925(1050) 75(515) 30(205) 35
TP347 Solution 1900(1040) 75(515) 30(205) 35
TP347H Solution Cold: 2000(1100) Hot: 1925(1050) 75(515) 30(205)
ASTM A312 Equivalent steel grade:
ASTM A312 JIS G3459 DIN 17440 BS NF
TP304 SUS 304 TP X5CrNi 18 9 304S18 A 49-230
TP304H SUS 304 HTP 304S59 A 49-214
TP310 304 LTP X2 CrNi 19 9 304S14 A 49-230
TP316 SUS 304L TP
TP316H 310STP X5 CrNiMo 18 10 316S18 A 35-573
TP316L SUS 316 TP 316S59 A 49-230
TP321 SUS 316 LTP X2 CrNiMo 18 10 316S14 A 49-230
TP347 316 HTP x10 CrNiTi 18 9 321S18 A 49-230
TP347H SUS 316 LTP X5 CrNiNb 18 9 347S18 A 35-573
Nominal wall thickness for ASTM A312(Seamless and straight seame welded steel pipes)
NPS ASTM A312  WT Tolerance, %
+
1/8-2 1 /2 20.0 12.5
3~18, t/D≤ 5% 22.5 12.5
3~18, t/D> 5% 15.0 12.5
≥ 20, welded 17.5 12.5
≥ 20, seamless, t/D≤ 5% 22.5 12.5
≥ 20, seamless, t/D> 5% 15.0 12.5
ASTM A312 Stainless Steel Pipes OD Tolerance
NPS ASTM A312  OD Tolerance
+
inch mm inch mm
1/8~1 1 /2 > 1 1 /2~4 > 4~8 > 8~18 > 18~26 > 26~34 > 34~48 1/64(0.015) 1/32(0.031) 1/16(0.062) 3/32(0.093) 1/8(0.125) 5/32(0.156) 3/16(0.187) 0.4 0.8 1.6 2.4 3.2 4.0 4.8 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 0.8 0.8 0.8 0.8 0.8 0.8 0.8

Alloy steel specification, Standard and identification

Alloy Steel pipe contains substantial quantities of elements other than carbon such as nickel, chromium, silicon, manganese, tungsten, molybdenum, vanadium and limited amounts of other commonly accepted elements such as manganese, sulfur, silicon, and phosphorous.

ASTM A335 Chrome Moly Pipe
Alloy Steel Chemical composition
Steel Grade Standard Number Type Chemical composition Other
C Si S P Mn Cr Ni Mo Other ób ós δ5 HB
1Cr5Mo GB1221 Bar 0.15 0.5 0.03 0.035 0.6 4-6 0.6 0.45-0.6 590 390 18
1Cr5Mo GB6479 Pipe 0.15 0.5 0.03 0.035 0.6 4-6 0.45-0.6 Cu:0.25 390-590 195 22 ak J/cm2:118
1Cr5Mo GB9948 Pipe 0.15 0.5 0.03 0.035 0.6 4-6 0.6 0.45-0.6 Cu:0.25 390 195 22 187 Aku J:92
1Cr2Mo GB9948 Pipe 0.15 0.5-1 0.03 0.035 0.3-0.6 2.15-2.85 0.45-0.65 Cu:0.25 390 175 22 179 Aku J:92
12CrMo GB/T3077 Bar 0.08-0.15 0.17-0.37 0.035 0.035 0.4-0.7 0.4-0.7 0.3 0.4-0.55 Cu:0.3 410 265 24 179 ψ%:60;Aku2 J:110
12CrMo GB6479 Pipe 0.08-0.15 0.17-0.37 0.035 0.035 0.4-0.7 0.4-0.7 0.4-0.55 Cu:0.25 410-560 205 21 ak J/cm2:69
12CrMo GB9948 Pipe 0.08-0.15 0.17-0.37 0.035 0.035 0.4-0.7 0.4-0.7 0.3 0.4-0.55 Cu:0.25 410-560 205 21 156 Aku J:55
12CrMoG GB5310 Pipe 0.08-0.15 0.17-0.37 0.03 0.03 0.4-0.7 0.4-0.7 0.3 0.4-0.55 Cu:0.2 410-560 205 21 Akv J:35
12Cr1MoV GB/T3077 Bar 0.08-0.15 0.17-0.37 0.035 0.035 0.4-0.7 0.9-1.2 0.3 0.25-0.35 V:0.15-0.3;Cu:0.3 490 245 22 179 ψ%:50;Aku2 J:71
12Cr1MoVG GB5310 Pipe 0.08-0.15 0.17-0.37 0.03 0.03 0.4-0.7 0.9-1.2 0.3 0.25-0.35 V:0.15-0.3;Cu:0.2 470-640 255 21 Akv J:35
12Cr1MoVg GB713 Plate 0.08-0.15 0.17-0.37 0.03 0.03 0.4-0.7 0.9-1.2 0.3 0.25-0.35 Cu:0.3 440 245 19 Akv J:31
12Cr2Mo GB6479 Pipe 0.08-0.15 0.4-0.7 0.035 0.035 0.5 2-2.5 0.9-1.2 Cu:0.25 450-600 280 20 ak J/cm2:48
12Cr2MoG GB5310 Pipe 0.08-0.15 0.5 0.03 0.03 0.4-0.7 2-2.5 0.3 0.9-1.2 Cu:0.2 450-600 280 20 Akv J:35
15CrMo GB/T3077 Bar 0.12-0.18 0.17-0.37 0.035 0.035 0.4-0.7 0.8-1.1 0.3 0.4-0.55 Cu:0.3 440 295 22 179 ψ%:60;Aku2 J:94
15CrMo GB6479 Pipe 0.12-0.18 0.17-0.37 0.035 0.035 0.4-0.7 0.8-1.1 0.4-0.55 Cu:0.25 440-640 235 21 ak J/cm2:59
15CrMo GB9948 Pipe 0.12-0.18 0.17-0.37 0.035 0.035 0.4-0.7 0.8-1.1 0.3 0.4-0.55 Cu:0.25 440-640 235 21 170 Aku J:47
15CrMoG GB5310 Pipe 0.12-0.18 0.17-0.37 0.03 0.03 0.4-0.7 0.8-1.1 0.3 0.4-0.55 Cu:0.2 440-640 235 21 Akv J:35
15CrMog GB713 Plate 0.12-0.18 0.15-0.4 0.03 0.03 0.4-0.7 0.8-1.2 0.3 0.45-0.6 Cu:0.3 450-590 295 19 Akv J:31
15CrMoR GB6654 Plate 0.12-0.18 0.15-0.4 0.03 0.03 0.4-0.7 0.8-1.2 0.3 0.45-0.6 Cu:0.3 450-590 295 19 Akv J:35
Standards for Alloy pipes & tubes
ASTM A213 T91
ASTM A213M-09
for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
ASTM A333 Grade 6 alloy pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation.
ASTM A333
Standard Specification for Seamless and Welded Steel Pipe for Low-Temperature Service and Other Applications.
ASTM A335 P22 is the part of ASTM A335, the pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding.
ASTM A335
Astm A335 standard specication for seamless ferritic alloy-steel pipe for high-temperature service
Related alloy steel products:
Carbon steel flanges
Alloy steel flanges
Alloy flanges are designed with care using current techniques under the visionary guidance of accomplished professionals at manufacturing unit.
稀土合金耐磨管
Rare earth alloy wear-resistant tube
Rare earth alloy wear resistant pipe has the characteristics of fast velocity and high flow rate is used for pneumatic, pump slurry, etc.
Wear resistant alloy composite pipe
Wear resistant alloy composite pipe
Wear-resistant alloy steel pipe as the base, lined with ultra-wear-resistant alloy, through the centrifugal casting, metallurgy combined to form a solid.

ASTM A519- specification covers for several grades of carbon and alloy steel mechanical tubing, either hot-finished or cold-finished.

EN 10216 is a European standard suitable for seamless steel tubes for pressure purposes.

EN 10216 non alloy steel tubes EN 10216 non alloy steel tubes

The main steel grade:
  • P195GH, P235GH, P265GH, 13CrMo4-5, 10CrMo9-10
  • Other grades of steel pipe can be provided based on negotiations.


About Sunny Steel

Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.

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