JIS G3455 STS 370 Seamless Carbon Steel Pipes

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JIS G3455 STS 370 Seamless Carbon Steel Pipes used for high pressure service at an approximate maximum temperature of 350℃,The pipe are manufactured from killed steel by the seamless process.

Product Detail

Product Tags

 
JIS G3455 STS 370 Seamless Carbon Steel Pipes  For High Pressure Service
 
Standard:JIS G3455
Carbon Steel Pipes for High Pressure Service
 
JIS G3455 STS 370 Carbon Steel Pipes used for high pressure service at an approximate maximum temperature of 350℃
 
 
JIS G3455 STS 370 Carbon Steel Pipes Quick Details
Manufacture:Seamless process;  Hot-finished,Cold-finished
Out Dimensions: 14mm-508mm
Wall Thickness: 2mm-60mm
Length: Fixed(6m,9m,12,24m) or normal length(5-12m)
Ends: Plain End, Beveled End, Treaded
 
Additional Info
Port of Shipment: Tianjin, China
Payment Terms:T / T, LC
Delivery: 7-15 days after payment
Surface: Tubes will be varnished (Outside only) to prevent rust.
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Bundles (hexagonal),Wooden Boxes,Crates (steel/wooden) or as required
 
 
Method of Manufacture
(1)The pipe are manufactured from killed steel by the seamless process
(2)When required by the purchaser, the pipe may be furnished with a bevel end.
 
Heat treatment of JIS G3455 STS 370

Letter symbol of grade   Hot-finished seamless steel pipe  Cold-finished seamless steel pipe
STS 370 As manufactured. However, low temperature annealing of normalizing may be applied, as necessary. Low temperature annealed of normalized
 
 
Chemical Composition of JIS G3455 STS 370
Grade Chemical Composition %
C  Si Mn P S
STS 370 0.25 max. 0.10~0.35  0.30~1.10 0.035 max.  0.035 max.
 
 
Mechanical Properties of JIS G3455 STS 370
Letter symbol of grade Mechanical Properties
Tensile strength Yield strength Elongation %
kgf/m㎡  {N/ m㎡}  kgf/m㎡  {N/ m㎡}  No.11 and No.12 test pieces No. 5 test pieces No. 4 test piece  
Longitudinal  Transverse Longitudinal Transverse
STS370  38 {373}min  22{216} min 30 min  25 min 23 min 28 min
 
 
Appearance
(1)The pipe are practically straight, and its both ends shall be at a right angle to its axis.
(2) The inside and outside surfaces of the pipe shall be well-finished and free form defects that are detrimental to practical use.
 
 
Testings
(1)Chemical analysis
(2)Tensile Test
(3)Flattening Test
(4) Bending Test
(5) Hydrostatic Test or Nondestructive Examination
 
 
Dimensions Tolerance of JIS G3455 Carbon Steel Pipes
Division  Tolerances on outside diameter Tolerances on wall thickness Tolerances on wall thickness
deviation
Hot-finished seamless steel pipe 50mm Under 【0.5mm ≤4mm Under
+0.6mm
-0.5mm
≤4mm or over
+15%
-12.5%		 Within 20%
of wall thickness
50mm or over 200mm to and excl.
【1.6mm
200mm of over 【0.8%
For the pipe 350mm of over, the tolerances on outside diameter may be determined by the
measurement of the length of circumference. shall be 【0.5%.
Cold-finished seamless steel pipe 40mm Under【0.3mm ≤2mm Under
【0.2mm		 -
40mm of over 【0.8% ≤2mm or over
【10%
For the pipe 350mm or over, the tolerances on outside diameter may be determined by the
measurement of the length of circumference, In this case, the tolerances shall be 【0.5%.
 
 
Marking
Each pipe having passed the inspection shall be marked with the following items. However, the smaller pipes of other pipes specified by the purchaser may be bundled together and marked for each bundle by a suitable means. In both cases, the order of arranging the marked items is not specified.
 
When approved by the purchaser, part of the items may be omitted.
(1) Letter symbol of grade(STS 370 )
(2) Letter symbol indicating the manufacturing process
(3) Dimensions
(4) Manufacture’s name or its identifying brand
(5) Letter symbol Z indicating the supplementary quality specification
 
Notes
The letter symbol indicating the manufacturing process shall be as follows, provided that the dash may be omitted leaving a blank.
Hot-finished seamless steel pipe - S - H
Cold-Finished seamless steel pips - S - C
 
Note
The dimensions shall be expressed as follows:
Nominal dia. x nominal wall thickness or outside dia. x wall thickness
Example : 50A 】Sch 80
 
 
Report
We will submit to the purchaser the report carrying the test results, method of manufacture, ordered dimensions, quantity and work lot number traceable to the manufacturing conditions, etc.

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