Steel Pipes - ASTM A312

ASTM A312 for high temperature and generally corrosive austenitic seamless and straight welded steel pipes ranging from 1/8 inch (6.4mm) to 30 inch (760mm) in diameter and thickness from standard (SCH 5S) to Form XXS (SCH XXS)

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Steel Pipes - ASTM A312

Specifications	Range
Out Diameter	1/8"-30"
Wall Thickness	less 3/8"

ASTM A312 covers seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service.

Optional supplementary requirements are provided for pipe where a greater degree of testing is desired. These supplementary requirements call for additional tests to be made and, when desired, it is permitted to specify in the order one or more of these supplementary requirements.

Table X1.1 lists the standardized dimensions of welded and seamless stainless steel pipe as shown in ANSI B36.19. These dimensions are also applicable to heavily cold worked pipe. Pipe having other dimensions is permitted to be ordered

Nominal Pipe Size (NPS): 1/8, 1/4, 3/8, 1/2, 3/4, 1, 11/4, 11/2, 2, 21/2 inch
Outside Diameter: 10,3 - 73 mm (0,405 - 2,875 inch)
Wall Thickness: 1,73 - 7,01 (0,068 - 0,276 inch)

Notes:
Steel Grades - TP 304, TP 304L, TP 316, TP 321

Size of pipes in accordance with ANSI/ASME B36. 19M.
All technical requirements in accordance with ASTM A530.
Length tolerance of measured pipes is not greater than +10 mm.
The quality of pipes is ensured by manufacturing process and non-destructive test.
Intergranular corrosion test in accordance with ASTM A262, Practice E is available.

Sizes
inch	OD, mm	Wall Thickness,	Max. Length, м
1/8	10,3	1,73; 2,11	12
1/4	13,7	2,24; 3,02
3/8	17,1	2,31; 3,20
1/2	21,3	2,11; 3,73
3/4	26,7	2,87; 3,91
1	33,4	3,38; 4,55; 6,35	10
1 1/4	42,4	3,56; 4,85; 6,35
1 1/2	48,3	3,68; 5,03; 7,14
2	60,3	3,58; 3,91; 4,37; 4,78; 6,35; 6,94; 7,14
2 1/2	73,0	3,58; 3,95; 4,37; 4,78; 5,16; 5,49; 6,35; 7,01

Mechanical properties
Steel Grade	Tensile Strength, N/mm2 (min)	Yield Strength, N/mm2 (min)	Elongation, % (min)
TP304	515	205	35
TP304L	485	170	35
TP316	515	205	35
TP316L	485	170	35
TP321	OD < 17,1 mm - 515; OD > 17,1 mm - 485	OD < 17,1 mm - 205; OD > 17,1 mm - 170	35

Chemical Composition (%, max)
Steel Grade	C	Si	Mn	Cr	Ni	Mo	S	P
TP304	0,08	0,75	2	18 - 20	8 - 11	-	0,03	0,04
TP304L	0,035	0,75	2	18 - 20	8 - 13	-	0,03	0,04
TP316	0,08	0,75	2	16 - 18	11 - 14	2 - 3	0,03	0,04
TP316L	0,035	0,75	2	16 - 18	10 - 15	2 - 3	0,03	0,04
TP321	0,08	0,75	2	17 - 20	9 - 13	-	0,03	0,04