Stainless Steel Welded Pipe ASTM A312

Type: Welded Material: Stainless Steel Section Shape: Round Specification: ASTM A312/ASME SA312 Technique: SAW Usage: Pipeline Transport Trademark: VASTAR Origin: China Stainless Steel Welded Pipe ASTM A312
Standard: ASTM A312/ASME SA312
Material: 304, 304L, 304H, 310S, 316, 316L, 316H, 316Ti, 321, 321H, 347, 347H
Size: OD(6-1016mm) X WT(1-50mm)
Application: Used in Pipeline for transporting corrosive fluid.

Inspection items:
1, Chemical Composition
2, Size
3, Mechanical Properties
4, Flattening Test
5, Hydrostatic Test or Eddy current test or Ultrasonic test
6, Surface quality, straightness
 

NPS	ASTM A312  OD Tolerance
	+		-
	inch	mm	inch	mm
1/8~11/2	1/64(0.015)	0.4	1/32(0.031)	0.8
>11/2~4	1/32(0.031)	0.8	1/32(0.031)	0.8
>4~8	1/16(0.062)	1.6	1/32(0.031)	0.8
>8~18	3/32(0.093)	2.4	1/32(0.031)	0.8
>18~26	1/8(0.125)	3.2	1/32(0.031)	0.8
>26~34	5/32(0.156)	4.0	1/32(0.031)	0.8
>34~48	3/16(0.187)	4.8	1/32(0.031)	0.8

 

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

 

Material	ASTM A312 Chemical Composition % Max
	C	Mn	P	S	Si	Cr	Ni	Mo	N B	Nb	Ti
TP304	0.08	2.00	0.045	0.030	1.00	18.0-20.0	8.0-11.0	^	^	^.	^
TP304H	0.04-0.10	2.00	0.045	0.030	1.00	18.0-20.0	8.0-11.0	^	^	^	^
TP304L	0.035 D	2.00	0.045	0.030	1.00	18.0-20.0	8.0-13.0	^	^	^	^
TP310S	0.08	2.00	0.045	0.030	1.00	24.0-26.0	19.0-22.0	0.75
TP316	0.08	2.00	0.045	0.030	1.00	16.0-18.0	11.0-14.0	2.00-3.00	^	^	^
TP316L	0.035	2.00	0.045	0.030	1.00	16.0-18.0	10.0-14.0	2.00-3.00	^	^	^
TP316H	0.04-0.10	2.00	0.045	0.030	1.00	16.0-18.0	11.0-14.0	2.00-3.00	^	^	^
TP316Ti	0.08	2.00	0.045	0.030	0.75	16.0-18.0	10.0-14.0	2.00-3.00	0.10	^	5x(C+N)-0.70
TP321	0.08	2.00	0.045	0.030	1.00	17.0-19.0	9.0-12.0	^	0.10	^	5C -0.70
TP321H	0.04-0.10	2.00	0.045	0.030	1.00	17.0-19.0	9.0-12.0	^	^	^	4C -0.60
TP347	0.08	2.00	0.045	0.030	1.00	17.0-19.0	9.0-13.0			10xC-1.00	^
TP347H	0.04-0.10	2.00	0.045	0.030	1.00	17.0-19.0	9.0-13.0	^	^	8xC-1.00	^

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