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Seamless steel pipe/tubes

JIS Seamless Pipe

Japanese Industrial Standards (JIS) developed by the organization apply to a wide variety of industrial services and technologies such as automobiles, metallurgy, ships and medical equipment


Seamless steel pipe is alos called CDS pipes (Cold drawn seamless pipe). It’s is used widely in maching parts, shafts, bearings, cylinders having strength of 75000 PSD tensile. It is a solid carbon steel rod which is pushed on to the mandrel to form the shape of tube. It is availabe in different sizes. The method for making cold-drawn seamless pipes involves taking a round “billet” or bar of steel and boring it in the center, turning it, cutting it, heating it to make it more pliable, then “drawing” it (extruding or pulling it) to make it a longer and thinner tube.

Range of JIS standards for steel pipes

JIS seamless pipe according to alloy, stainless steel or carbon. It tests steel’s properties, hardness, resistance to corrosion, pitting, heat treating processes and others. The results are listed in a main JIS steel grade for steel pipe as below.

JIS G3429
Steel grade:STH38, STH55, STH67
Application: Seamless Steel Tubes in High Pressure Gas Cylinder
JIS G3439
Steel grade: STO-G, STO-H, STO-J, STO-N, STO-C, STO-D, STO-E
Application: Seamless Steel Oil Well, Casing, Tubing and Drill Pipe
JIS G3441
Steel grade:SCr 420TK, SCM415TK, SCM418TK, SCM420TK, SCM430TK, SCM435TK, SCM440TK
Application:Alloy Steel Tubes for General Structural Purpose
JIS G3444
Steel grade: STK 30, STK 41, STK 50, STK 51, STK 55
Application: Carbon Steel Tubes for General Structural Purpose
Dimension Range: 21.7-1016.0 mm
JIS G3445
Steel grade: STKM11A,STKM12A, STKM12B, STKM12C, STKM13A, STKM13B, STKM13C, STKMI4A, STKM14B, STKM14C, STKM15A, STKM18C, STKM16A, STKM18C, STKM17A, STKM17C, STKM18A, STKM18B, STKM18C, STKM19A, STKM19C, STKM20A
Application: Carbon Steel Tubes for Machine Structural Purposes
JIS G3454
Steel grade: STPG 38, STPG 42
Application: Carbon Steel Pipes for Pressure Service
Dimension Range: 10.5-660.4 mm
JIS G3455
Steel grade: STS 38, STS 42, STS 49
Application: Carbon Steel Pipes for High Pressure Service
Dimension Range: 10.5-660.4 mm
JIS G3456
Steel grade: STPT 38, STPT 42, STPT 49
Application: Carbon Steel Pipes for High Temperature Service
Dimension Range:10.5-660.4 mm
JIS G3458
Steel grade:STPA 12, STPA 20, STPA 22, STPA 23, STPA 24, STPA 25, STPA 26
Application: Alloy Steel Pipes for Service
Dimension Range:10.5-660.4 mm
JIS G3460
Steel grade:STPL 39, STPL 46, STPL 70
Application: Steel Pipes for Low Temperature Service
Dimension Range:10.5-660.4 mm
JIS G3461
Steel grade:STB 35, STB 42, STB 52
Application: Carbon Steel Boiler and Heat Exchanger Tubes
Dimension Range:15.9-139.8 mm
JIS G3462
Steel grade: STBAl2, STBAM, STBA20, STBA22, STBA23, STBA24, STBA25, STEA26
Application:Alloy Steel Boiler and Heat Exchanger Tubes
Dimension Range: 15.9-139.8 mm
JIS G3464
Steel grade: STBL 39, STBL46, STBL 70
Application: Steel Heat Exchanger Tubes for Low Temperature Service
Dimension Range: 15.9-139.8 mm
JIS G3465
Steel grade: STM-055, STM-C65, STM-R60, STM-1170, STM-1180, STM-R85
Application: Seamless Steel Tubes for Drilling
Dimension Range: Casing: 43-142mm / Hollow Pipes: 34-180mm / Drilling:33.5-50mm
JIS G3467
Steel grade: STF 42, STFAl2, STFA22, STFA23, 5TFA24, STFA23, STFA26
Application:Steel Tubes for Fired Heater
Dimension Range:60.5-267.4mm

Measurement size & Testing
Packing:
Delivery:
Table 1: Tolerance on Outside Diameter in JIS G3441, G3444, G3445
Application Tolerance on Outside Diameter (mm)
JIS G3441
JIS G3444
JIS G3445
=50 ±0.5
>50 ±1%
JIS G3441
JIS G3444
JIS G3445
<50 ±0.25
>50 ±0.5%
JIS G3441
JIS G3445
<25 ±0.12
>25-40 ±0.15
>40-50 ±0.18
>5:.60 ±0.20
>60-70 ±0.23
>70-80 ±0.25
>80-90 ±0.30
>90-100 ±0.40
>100 ±0.5%
JIS G3441 <13 ±0.25
>13-25 ±0.40
>25-40 ±0.60
>40-65 ±0.80
>65-90 ±1.00
>90-140 ±1.20
>140 By agreement
Table 2: Tolerance on Wall Thickness in JIS G3441, G3444, G3445
Application Tolerance on Wall Thickness (mm)
JIS G3441
JIS G3444
JIS G3445
<=4 -0.5,+0.6
>4 -12.5%, +15%
JIS G3441
JIS G3444
JIS G3445
<=3 ±0 .3
>3 ±10%
JIS G3441
JIS G3445
<=2 ±0.15
>2 ±8%
Table 3: Tolerance on Outside Diameter and Wall Thickness in JIS G3454
Application Tolerance on Outside Diameter Tolerance on Wall Thickness
 Size <40A ±0.5mm <=4mm +0.6mm
-0.5%
>50A, <125A ±1%
Hot Rolled
Seamless Pipes
150A ±1.6mm >4mm +15%
-12.5%
>200A ±0.8%
More than 350mm,the
Tolerance is ±0.5%
Cold Drawn
Seamless Pipes
and Electric
Resistant
Welded Pipes
<25A ±0.3mm <=3mm ±0.3mm
>32A ±0.8% >3mm ±10%
But more than 350mm, the 
Tolerance is ±0.5%
Table 4: Tolerance on Outside Diameter and Wall Thickness in JIS G3455, G3456, G3458, G3460
Application Tolerance on Outside Diameter Tolerance on Wall Thickness
Hot Rolled
Seamless Pipes
<=50mm ±0.5mm <=4mm ±0.5mm
>50-160mm ±1%
>160-200mm ±1.6mm >4mm ±12.5%
>200mm ±0.8%
More that 350mm, the
Tolerance is ±0.5%
Cold Drawn
Seamless Pipes
and Electric Resistant
Welded Pipes
<=40mm ±0.3mm <=2mm ±0.2mm
>40mm ±0.8% >2mm ±10%
More than 350 mm the
Tolerance is ±0.5%
Table 5: Tolerance on Outside Diameter in JIS G3461, G3462, G3464
Outside
Diameter
Tolerance on Outside Diameter
Hot Rolled
Seamless
Pipes
Seamless
Pipes
Through
Quench and
Normalized
Cold Drawn
Seamless Pipes
throng, the Hot
Treatment Except
Quench and
Normalized
Electric Welded
Pipes Except
Cold Drawn
Cold Drawn
Electric Welded 
Pipes
mm
<=25 +0.4
-0.8
±0.25 ±0.10 ±0.15 ±0.10
>25.40 ±0.25 ±0.15 ±0.20 ±0.15
>40-50 ±0.25 ±0.20 ±0.25 ±0.20
>50.60 ±0.25 ±0.25 ±0.30 ±0.25
>60-80 ±0.30 ±0.30 ±0.40 ±0.30
>80.100 ±0.40 ±0.40 -0.60,+0.40 ±0.40
>100-120 +0.4
-1.2
-0.60,+0.40 -0.60,+0.40 -0.80,+0.40 -0.60,+0.40
>120-160 -0.80,+0.40 -0.80,+0.40 -1.00,+0.40 -0.80,+0.40
>160-200 -1.8,+0.4 -1.20,+0.40 -1.20,+0.40 -1.20,+0.40 -1.20,+0.40
>200 -2.4,+0.4 -1.60,+0.40 -1.60,+0.40 -1.60,+0.40 -1.60,+0.40
Table 6: Tolerance on Wall Thickness in JIS G3461, G3462, G3464
Wall
Thickness
(mm)
Hot Rolled Seamless Pipe Cold Drawn Seamless Pipe Electric Welded Pipe
Outside Diameter, mm Outside Diameter, mm Outside Diameter, mm
<=100 >100 <=40 >40 <=40 >40
(%)
<=2 -- -- -0,+0.4mm +22
-0
-0,+0.3mm +18
0
>2-2.4 -0,+40 -- +20
-,0
+18
-0
>2.4-3.8 -0,+35 -0,+35
>3.8-4.6 -0,+23 -0,+33
>4.6 -0,+28 -0,+28
Table 7: Tolerance on the Length in JIS G3461, G3462, G3464
Item Tolerance an Length
OD<50mm <7m -0, +7mm
>=7m Every 3m increase in length, the plus tolerance be increased by 3mm with a maximum of 15mm
OD>=50mm <7m -0, +10mm
>=7m Every 3m increase in length, the plus tolerance be increased by 3mm with a maximum of 15mm
OD: Outside Diameter
Table 8: Tolerance on Outside Diameter in JIS G3465
Application Tolerance on Outside Diameter (mm)
Hot Rolled <=50 ±0.5
>50 ±1%
Cold Drawn <=40 ±0.2
>40 ±0.5%

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