JIS G3455 STS 480 Carbon Steel Pipes for High Pressure Service Standard:JIS G3455 Carbon Steel Pipes for High Pressure Service JIS G3455 STS 480 Carbon Steel Pipes used for high pressure service at an approximate maximum temperature of 350℃   JIS G3455 STS 480 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   Heat treatment of JIS G3455 STS 480 Carbon Steel Pipes for High Pressure Service

Letter symbol of grade	Hot-finished seamless steel pipe	Cold-finished seamless steel pipe
STS 480	Low temperature annealed of normalized

  Chemical Composition of JIS G3455 STS 480 Carbon Steel Pipes for High Pressure Service

Grade	Chemical Composition %
	C	Si	Mn	P	S
STS 480	0.33 max.	0.10~0.35	0.30~1.50	0.035 max.	0.035 max.

  Mechanical Properties of JIS G3455 STS 480 Carbon Steel Pipes for High Pressure Service

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
STS 480	49{481} min.	28{275} min.	25 min.	20 min.	17 min.	22 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 for High Pressure Service

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 480 ) (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.