ASTM A312 Pipe – ASTM A312 Stainless Steel Pipe

ASTM A312 pipe manufacturer in India
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ASTM A312 Stainless Steel Pipe

ASTM A312 Pipe is a specification for seamless, welded, and heavily cold-worked austenitic stainless steel pipe intended for high-temperature and general corrosive-service applications. ASTM A312 stainless steel pipe is widely used in chemical processing, petrochemical, oil and gas, food processing, pharmaceutical, power generation, and other industrial systems.

The specification covers stainless steel pipe manufactured to defined requirements for chemical composition, mechanical properties, dimensions, testing, and manufacturing quality.

When selecting ASTM A312 pipe, buyers should consider the required stainless steel grade, pipe size, schedule/wall thickness, manufacturing method, temperature, pressure, corrosion environment, and applicable inspection requirements.

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Table of Contents

SA312 pipe specification

SA312 pipe specification

SPECIFICATIONDETAILS
Outer Diameter1/8" NPS to 30" NPS
Thickness0.6 mm to 12.7 mm
LengthDouble Random, Single Random & Cut Length
EndPlain, Beveled
TypesSeamless/ ERW / Welded / EFW / Fabricated Pipe
SchedulesSCH. 10, 5, 20, 40, 30, 60, 100, 80, 120, 160, 140, XXS
ASTM A312 pipe

ASTM A312 pipe

ASTM A312 stainless steel pipe

ASTM A312 stainless steel pipe

SA 312 pipe

SA 312 pipe

ASTM A312 seamless stainless steel pipe

ASTM A312 seamless stainless steel pipe

A312 welded pipe

A312 welded pipe

A312 stainless pipe

A312 stainless pipe

ASTM A312 stainless steel pipe dimensions

ASTM A312 stainless steel pipe dimensions

NPS, inch OD, mm Max. Length, м Wall Thickness, milimeter
1/8 10,3 12 1,73; 2,11
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 10 3,38; 4,55; 6,35
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

ASTM A312 pipe weight

ASTM A312 pipe weight

Nominal Pipe Size Schedule Wall Thickness (mm) OD (mm) Weight (kg/m)
2" SCH 40 3.91 60.33 6.17
2 1/2" SCH 40 5.16 73.03 9.37
3" SCH 40 5.49 88.90 12.40
4" SCH 40 6.02 114.30 16.38
6" SCH 40 7.11 168.28 28.26
8" SCH 40 8.18 219.08 42.69
1/2" SCH 40 2.77 21.34 1.27
3/4" SCH 40 2.87 26.67 1.71
1" SCH 40 3.38 33.40 2.55
1 1/4" SCH 40 3.56 42.16 3.69
1 1/2" SCH 40 3.68 48.26 4.55
10" SCH 40 9.27 273.05 60.33
12" SCH 40 9.53 323.85 75.52

A312 TP316L pipe application

A312 TP316L pipe application

Oil and Gas Processing Construction Energy industries
Pulp and Paper Pharmaceuticals Chemicals
Food Processing Automotive Industry Power Plants

ASTM A312 stainless steel pipe pressure rating

ASTM A312 stainless steel pipe pressure rating

Pressure Rating(psig)
Pipe Size
(inches) 		Pipe Schedule Temperature(oF)
100 200 300 400 500 600 650 700 750
5" 40 1342 1158 1040 956 889 847 822 805 797
80 1981 1709 1535 1411 1312 1250 1213 1189 1176
160 3414 2945 2646 2433 2262 2155 2091 2049 2027
6" 40 1219 1052 945 869 808 770 747 732 724
80 1913 1650 1483 1363 1267 1208 1172 1148 1136
160 3289 2836 2549 2343 2179 2076 2014 1973 1953
1" 40 3168 2629 2362 2171 2019 1924 1867 1824 1810
80 4213 3634 3265 3002 2791 2659 2580 2528 2501
160 6140 5296 4759 4375 4068 3876 3761 3684 3646
1 1/2" 40 2257 1947 1750 1608 1496 1425 1383 1354 1340
80 3182 2744 2466 2267 2108 2009 1949 1909 1889
160 4619 3984 3580 3291 3060 2916 2829 2772 2743
2" 40 1902 1640 1474 1355 1260 1201 1165 1141 1129
80 2747 2369 2129 1957 1820 1734 1682 1648 1631
160 4499 3880 3486 3205 2980 2840 2755 2699 2671
3" 40 1806 1558 1400 1287 1196 1140 1106 1084 1072
80 2553 2202 1979 1819 1691 1612 1564 1532 1516
160 3840 3312 2976 2736 2544 2424 2352 2316 2280
4" 40 1531 1321 1187 1091 1014 967 938 919 909
80 2213 1909 1715 1577 1466 1397 1355 1328 1314
160 3601 3106 2791 2566 2386 2273 2206 2161 2138
8" 40 1073 926 832 765 711 678 657 644 637
80 1692 1459 1311 1205 1121 1068 1036 1015 1005
160 3175 2738 2460 2262 2103 2004 1944 1905 1885
10" 40 974 840 755 694 645 615 596 584 578
80 1609 1388 1247 1147 1066 1016 986 966 956
160 3147 2714 2439 2242 2085 1986 1927 1880 1868

A312 EFW pipe price

A312 EFW pipe price

Description Price in USD Price in Kilogram (INR)
ASTM A 312 Seamless Pipes, Size: 1/2 Inch, 3/4 Inch $ 4.67 ₹ 400
Hot Rolled ASTM A312 TP316 SS Pipe, Thickness: 3-4 MM $ 7.24 ₹ 620
Astm A312 SS Pipes, Grade: SS304, Size: 2 inch $ 2.93 ₹ 251
Welded ASTM A312 TP 904L SS Pipe, Size: 1/4" NB to 36" NB $ 11.68 ₹ 1000

ASTM A312 pipe tolerances

ASTM A312 pipe tolerances

NPS ASTM A312 WT Tolerance, %
+ –
≥ 20, welded 17.5 12.5
≥ 20, seamless, t/D≤ 5% 22.5 12.5
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, seamless, t/D> 5% 15.0 12.5

ASTM A312 pipe sizes

ASTM A312 pipe sizes

Outer Diameter Wall Thickness Schedule Nominal Size
mm 5S 10S 40S STD 80S Nominal Pipe Size DN
660.4 – – – 9.53 – 26 650
33.4 1.65 2.77 3.38 3.38 4.55 1 25
48.3 1.65 2.77 3.68 3.68 5.08 1 1∕2 40
60.3 1.65 2.77 3.91 3.91 5.54 2 50
73 2.11 3.05 5.16 5.16 7.01 2 1∕2 65
558.8 4.78 5.54 – 9.53 – 22 550
42.2 1.65 2.77 3.56 3.56 4.85 1 1∕4 32
88.9 2.11 3.05 5.49 5.49 7.62 3 80
101.6 2.11 3.05 5.74 5.74 8.08 3 1∕2 90
114.3 2.11 3.05 6.02 6.02 8.56 4 100
13.7 – 1.65 2.24 2.24 3.02 1∕4 8
141.3 2.77 3.4 6.55 6.55 9.53 5 125
508 4.78 5.54 – 9.53 – 20 500
17.2 – 1.65 2.31 2.31 3.2 3∕8 10
10.3 – 1.24 1.73 1.73 2.41 1∕8 6
21.3 1.65 2.11 2.77 2.77 3.73 1∕2 15
273.1 3.4 4.19 9.27 9.27 12.7 10 250
26.7 1.65 2.11 2.87 2.87 3.91 3∕4 20
609.6 5.54 6.35 – 9.53 – 24 600
168.3 2.77 3.4 7.11 7.11 10.97 6 150
219.1 2.77 3.76 8.18 8.18 12.7 8 200
323.9 3.96 4.57 9.53 9.53 12.7 12 300
355.6 3.96 4.78 – 9.53 – 14 350
406.4 4.19 4.78 – 9.53 – 16 400
457.2 4.19 4.78 – 9.53 – 18 450
711.2 – – – 9.53 – 28 700
762 6.35 7.92 – 9.53 – 30 750

A312 304 pipe chemical composition

A312 304 pipe chemical composition

Grade Sulfur Carbon Silicon Chromium Manganese Nickel Molybdenum Phosphorous
TP316 0,03 0,08 1,0 16.0 – 18.0 2.00 10.0 – 14.0 2.00 – 3.00 0,045
TP304 0,03 0,08 1,0 18.0 – 20.0 2.00 8.0 – 11.0 – 0,045
TP304L 0,03 0,035 1,0 18.0 – 20.0 2.00 8.0 – 13.0 – 0,045
TP316L 0,03 0,035 1,0 16.0 – 18.0 2.00 10.0 – 15.0 2.00 – 3.00 0,045
TP321 0,03 0,08 1,0 17.0 – 19.0 2.00 9.0 – 12.0 – 0,045

Mechanical properties of SA312 TP304 pipe

Mechanical properties of SA312 TP304 pipe

Grade UNS Yield Strength
Min, Ksi [MPa] 		Tensile Strength
Min, Ksi [MPa]
TP309S S30908 30 [205] 75 [515]
TP310S S31008 30 [205] 75 [515]
TP316 S31600 30 [205] 75 [515]
TP316L S31603 25 [170] 70 [485]
TP316H S31609 30 [205] 75 [515]
TP304 S30400 30 [205] 75 [515]
TP304L S30403 25 [170] 70 [485]
TP304H S30409 30 [205] 75 [515]
TP304N S30451 35 [240] 80 [550]
TP304LN S30453 30 [205] 75 [515]
TP316N S31651 35 [240] 80 [550]
TP316LN S31653 30 [205] 75 [515]
TP317 S31700 30 [205] 75 [515]
TP317L S31703 30 [205] 75 [515]

Testing and inspection of A312 ERW pipe

Testing and inspection of A312 ERW pipe

Radiographic Examination (option) Transverse or Longitudinal Tension Test
Weld Decay Tests Grain Size Determinations
Flattening Test (option) Intergranular Corrosion Test (option)
Mechanical Tests Hydrostatic or Nondestructive Electric Test
Weld Decay Test (option)

ASTM A312 pipe od tolerance

ASTM A312 pipe od tolerance

NPS SA312 pipe OD Tolerance
+ –
inch milimeter inch milimeter
1/8~1 1 /2
> 1 1 /2~4
> 4~8
> 8~18
> 18~26
> 26~34
> 34~48 		1/64(0.015)
1/32(0.031)
1/16(0.062)
3/32(0.093)
1/8(0.125)
5/32(0.156)
3/16(0.187) 		0.4
0.8
1.6
2.4
3.2
4.0
4.8 		1/32(0.031)
1/32(0.031)
1/32(0.031)
1/32(0.031)
1/32(0.031)
1/32(0.031)
1/32(0.031) 		0.8
0.8
0.8
0.8
0.8
0.8
0.8

ASTM A312 seamless pipe equivalent

ASTM A312 seamless pipe equivalent

ASTM UNS NO. KOREA/JAPANES GERMAN BRITISH FRENCH ITALIAN
STAND ARD KS/JIS Symbol KS/JIS Numbe Remarks DIN Type DIN
Number 		Material
Number 		Remarks B.S
Number 		B.S
Grade 		Remarks AFNOR Type NF Number Ramarks UNI Type UNI Number Ramarks
A 312

Smls and Welded Austenitic SS Pipe

TP 316H S34609 310STP D3576 / G3459 -16 -3 3605 316S59 TUZ6CND17- 12 A 49-230 X8 CrNiNb 17
12 		6904 (3b)
TP 316L S31603 STS 316TP / SUS 316TP D3576 / G3459 -16 X2 CrNiMo 18 10 17440 1.4404 (3b) 3605 316S14 TUNZ2CND1 7-12 A 49-230 X2 CrNiMo 17 12 6904 Dalmine 941(3b)
TP 321 S32100 STS 316HTP /SU D3576 / G3459 -16 x10 CrNiTi 18 9 17440 1.4541 (3b) 3605 321S18 Z6 CNT 18.11 A 49-230 X6 CrNiTi 18
11 		6904 (3b)
TP 304 S30400 STS 304TP / SUS 304 TP D3576 / G3459 -16 X5CrNi 18 9 17440 1.4301 (3b) 3605 304S18 TU Z6 CN19- 10 A 49-230 X5 CrNi 18
10 		6904 (3b)
TP 304H S30409 STS 304HTP / SUS 304HTP D3576 / G3459 -16 -3 3605 304S59 TU Z6 CN19- 10 A 49-214 X8 CrNi 19
10 		6904 (3b)
TP 304L S30403 STS 304LTP/SU D3576 / G3459 -16 X2 CrNi 19 9 17440 1.4306 (3b) 3605 304S14 TU Z2 CN19- 11 A 49-230 X2 CrNi 18
11 		6904 (3b)
TP 310 S31000 304LTP D3576 / G3459 -16 -3 X22 Cr Ni 25 20 6904 (3b)(11)
TP 316 S31600 STS 310STP/SU D3576 / G3459 -16 X5 CrNiMo 18 10 17440 1.4401 (3b) 3605 316S18 Z 6 CND
17.11 		A 35-573 (3b) X5 CrNiMo 17 12 6904 (3b)
TP 347 S34700 316HTP D3576 / G3459 -16 X5 CrNiNb 18 9 1.4543 (3b) 3605 347S18 Z6 CNNb 18.11 A 35-573 (3b) X6 CrNiNb 18
11 		6904 (3b)
TP 347H S34709 STS 316LTP /SU D3576 / G3459 -16 -3 X6 CrNiNb 18
11 		6904 (3b)
321LTP
STS 321TP / SUS 321TP
STS 347TP / SUS 347TP
STS 347HTP / SUS 347HTP

ASTM A312 TP304 pipe tensile strength

ASTM A312 TP304 pipe tensile strength

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

SA312 TP316L seamless pipe services

SA312 TP316L seamless pipe services

Bending Sand Blasting Draw
Pickled Heat Treatment Machining Etc
Annealed Polish

ASTM A312 pipe schedule

ASTM A312 pipe schedule

NPS OD SCH 40S SCH 10S SCH 5S SCH 80S
22 558.8 – 5.54 4.78 –
1 33.4 3.38 2.77 1.65 4.55
10 273.05 9.27 4.19 3.4 12.7
2.5 73.03 5.16 3.05 2.11 7.01
1.25 42.16 3.56 2.77 1.65 4.85
18 457.2 9.53 4.78 4.19 12.7
8 219.08 8.18 3.76 2.77 12.7
1.5 48.26 3.68 2.77 1.65 5.08
6 168.28 7.11 3.4 2.77 10.97
4 114.3 6.02 3.05 2.11 8.56
1/2 21.34 2.77 2.11 1.65 3.73
1/4 13.72 2.24 1.65 – 3.02
14 355.6 9.53 4.78 3.96 12.7
24 609.6 9.53 6.35 5.54 12.7
3/4 26.67 2.87 2.11 1.65 3.91
3/8 17.15 2.31 1.65 – 3.2
12 323.85 9.53 4.57 3.96 12.7
20 508 9.53 5.54 4.78 12.7
2 60.33 3.91 2.77 1.65 5.54
3.5 101.6 5.74 3.05 2.11 8.08
16 406.4 9.53 4.78 4.19 12.7
5 141.3 6.55 3.4 2.77 9.53
3 88.9 5.49 3.05 2.11 7.62

What Is ASTM A312 Pipe?

ASTM A312 is the ASTM International specification commonly referenced for seamless, welded, and heavily cold-worked austenitic stainless steel pipe used for high-temperature and general corrosive service. The specification covers stainless steel pipe manufactured to defined requirements for chemical composition, mechanical properties, dimensions, testing, and manufacturing quality.

It is important to understand that ASTM A312 is a material/product specification, not a single stainless steel grade. A pipe ordered to ASTM A312 will normally also have a specific grade designation. Grades commonly covered by the specification include:

  • TP304
  • TP304L
  • TP316
  • TP316L
  • TP321
  • TP321H
  • TP347
  • TP347H
  • Other grades per specification

Therefore, an enquiry such as "ASTM A312 pipe" is incomplete without specifying the required grade and dimensions.

Why Choose Spark Steel for ASTM A312 Pipe?

Spark Steel operates in the stainless steel products and industrial metal supply sector and provides stainless steel pipes and related products for industrial applications.

For an ASTM A312 stainless steel pipe requirement, customers should provide the complete technical specification, including: ASTM A312 + Grade + Size + Schedule/Thickness + Manufacturing Type + Length + Finish + Quantity

This allows the required material to be evaluated according to the project's technical requirements.

ASTM A312 Pipe Buying Guide

When sending an enquiry to a supplier, use a specification such as: ASTM A312 TP316L Seamless Stainless Steel Pipe, NPS 2, Schedule 40S, required length, quantity as required.

This is much more useful than sending only: "Need ASTM A312 pipe."

For larger industrial projects, also specify testing, inspection, certification and applicable code requirements.

Get a Quote for ASTM A312 Stainless Steel Pipe

For an ASTM A312 stainless steel pipe requirement, provide the complete technical specification: Grade + Size + Schedule + Manufacturing Type + Length + Quantity. Contact Spark Steel to enquire about product specifications, availability, and pricing.

Send Enquiry Call Now

Frequently Asked Questions About ASTM A312 Stainless Steel Pipe

ASTM A312 is a specification covering seamless, welded, and heavily cold-worked austenitic stainless steel pipe intended for high-temperature and general corrosive service.

No. ASTM A312 is a product specification, not a stainless steel grade. Grades such as TP304, TP304L, TP316, and TP316L fall under the specification.

The specification covers multiple austenitic stainless steel grades. Commonly specified grades include TP304, TP304L, TP316, TP316L, TP321, and TP347, subject to the applicable edition of the specification.

TP304 is an austenitic stainless steel grade covered by ASTM A312 and commonly used for general corrosive and industrial applications.

TP316L is a low-carbon austenitic stainless steel grade containing molybdenum and is widely used where corrosion resistance and welded construction are important considerations.

It can be. ASTM A312 covers seamless, welded, and heavily cold-worked pipe, so the manufacturing type must be specified when ordering.

The main difference is the manufacturing method. Seamless pipe is produced without a longitudinal welded seam, while welded pipe is manufactured by forming and joining stainless steel material.

It can be used in chemical processing, petrochemical, oil and gas, food processing, pharmaceutical, power generation, water, and other industrial applications.

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