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  • JIS  G 3454 STPG370 Carbon Seamless Steel Tubes

JIS G 3454 STPG370 Carbon Seamless Steel Tubes

Pipe ordered under this specification is for pressure service at an approximate maximum temperatures of 350℃.

PRODUCT DESCRIPTION

Standard: JIS G 3454

Application of JIS G 3454 Carbon Seamless Steel Pipe:

Pipe ordered under this specification is for pressure service at an approximate maximum temperatures of 350℃.

Manufacturing Process of JIS G 3454 Carbon Seamless Steel Pipe:

Pipes shall be seamless process: hot finished or cold finished.

Details of JIS G 3454 Carbon Seamless Steel Pipe We can supply:

Manufacture:Seamless process (hot finished and cold finished)

Size: O.D.: 15.0~660mm W.T.: 2~50mm

Grade:STPG370 ,STPG410

Length: 6M or specified length as required.

Ends: Plain End, Beveled End.

Chemical Composition and mechanical properties JIS G 3454 Carbon Seamless Steel Pipe

Grade and Chemical Composition (%)

GradeC≤Si≤MnP≤S≤
STPG3700.250.350.30~0.900.0400.040
STPG4100.300.350.30~1.000.0400.040







Mechanical Properties
GradeTensile strengthYield strengthElongation %
N/ m㎡N/ m㎡ No.11 or No.12 test piecesNo. 5 test piecesNo. 4 test piece


LongitudinalTransverseLongitudinalTransverse
STPG370370 min215 min30 min25 min28 min23 min
STPG410410 min245 min25 min20 min24 min19 min


Tolerance of outside diameter and wall thickness:

Tolerance of OD

DivisionTolerance on O.DTolerance on W.T
Hot finished seamless steel pipeNominal diametertoleranceThickness divisiontolerance
40A or under+/-0.5mmUnder 4mm 4mm or over+0.6mm -0.5mm +15%-12.5%
50A or over up to and incl.125A+/-1%
150a+/-1.6mm
200A or over+/-0.8%
Cold finished seamless steel pipe 24A or under+/-0.3mmUnder 3mm 3mm or over+/-0.3mm +/-10%

32A or over+/-0.8%

For pipes of nominal size 350A or over, the tolerance on O.D maybe determined by the circumferential length. In this case, the tolerance shall be +/-0.5%


Ordering information:

a.Quantity ( feet, meters, or number of lengths)

b.Name of material(seamless carbon or welded)

c.Grade

d.Condition(hot finished or cold finished)

e.Size (outside diameter and wall thickness)

f.Length (specific and random)

g. Hydrostatic test or nondestructive electric test

Appearance for JIS G3454 Carbon Steel Seamless Pipes:

a.pipe shall be practically straight, and both ends shall be at a right angle to its axis

b.The inside and outside surfaces of pipe shall be well-finished and free from defects that are detrimental to practical use.

c.When pipes are repaired, grinding or machining may be applicable, however, the thickness after repairing shall be within the tolerances of wall thickness.

d.The surface of the repaired part shall be smooth along the shape of pipes

Packing for JIS G3454 Carbon Steel Seamless Pipes:

a.Bare pipe, black coating or hot dip zinc-coated( customized);

b.In bundles with two cotton slings;

c.Both ends with end protectors;

d.Plain end, bevel end

e.Marking.