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ASTM A312 Grade Tp321 Welded Pipe and 321 SS Tubing manufacturer in India


The main issue with welding stainless steel alloy is that they are susceptible to intergranular corrosion. However, the exception for such conditions is the use of heat resisting steels such as Stainless Steel 321 Seamless Pipe. An austenitic alloy, grade 321 is stainless steel that is stabilized by the inclusion of titanium in its chemistry.

Stainless Steel 321 Seamless Pipe

Stainless Steel 321 Seamless Pipe
ASME SA 312 Tp 321 ERW Pipe

ASME SA 312 Tp 321 ERW Pipe

Unlike other stainless steels that contain higher amounts of carbon in their alloy, titanium is added to the alloy of Stainless Steel 321 Pipe, which prevents the formation of carbide precipitates. The formation of carbide precipitates is common between a temperature range of 427°C – 816°C. At elevated temperatures such as this, the carbon present in steels like 304 or 316 together with chromium reacts with the atmospheric oxygen, thus forming precipitates. Therefore welding at high temperatures is not conducive to the aforementioned grades. But in the case of titanium stabilized ASTM A312 TP 321 Stainless Steel Pipes, titanium will form titanium carbide, which in no manner hinders welding. Therefore, achieving a strong weld on these Stainless Steel 321 EFW Pipes pipes is possible. And they could be used in an as-welded condition as well. Despite its superior weldability properties, most industries prefer using the astm a312 grade tp321 Pipe solely because the material has great heat resistance properties and because there is no compromise in its other mechanical properties on account of the increase in temperature. Just as the material is immune to oxidation at temperatures as high as 816°C, the aisi 321 stainless steel pipe is an alloy that could satisfy the low temperature requirements of applications as well. Like any alloy that is to be used at elevated temperatures, the SS 321H welded pipe exhibits characteristics such as higher creep and stress rupture.

High quality 321 Stainless Steel Tubing exporter in India



Specification Chart of Stainless Steel 321 Pipe

check Standards & Specification Of SS 321 Erw Pipe, Grade 321 UNS S32100 Stainless Steel Tubing

Stainless Steel 321 Welded Tube Size 6.35 mm OD To 152 mm OD
Stainless Steel UNS S32100 Swg & Bwg 10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg.
SS 321 Tube wall thickness 0.020″ –0.220″, (special wall thicknesses available)
SUS 321 Stainless Steel Length Single Random, Double Random, Standard & Cut length Pipe & Tube
American Standard AISI, DIN, EN, GB, IS, JIS, ASTM, ASME Pipe
Size of ASTM A312 F321 Stainless Steel Seamless Pipes 4 to 219mm W. T.: 0.5 to 20mm
SAE 321 Stainless Steel Welded Pipes Size Chart 5.0 mm – 1219.2 mm
Stainless Steel 321 Tube Swg & Bwg 10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg.
321 Stainless Steel End
  • Plain End
  • Beveled End
  • Treaded
AISI 321 Stainless Steel Application Oil Pipe & Tube, Gas Pipe & Tube, Fluid Pipe & Tube, Boiler Pipe & Tube, Heat exchanger Tube
1.4541 AISI 321 SS Value Added Service Draw & Expansion as per required Size & Length, Polish (Electro & Commercial) Annealed & Pickled Bending, Machining Etc.
SS 321 Grade Specialize in
  • 321 SS Heat Exchanger &
  • Stainless Steel 321 Grade Condenser Tube
  • SS 321 Large Diameter Pipe
  • 321 Stainless Steel Capillary Tube
Schedule of Stainless Steel Grade 321 Pipes SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
SS UNS S32100 Seamless Tube Size 3.35 mm OD To 101.6 mm OD
Food Grade 321 Stainless Steel Finish Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF
We can also cut, thread, and groove SUS 321 Stainless Steel Pipes to meet your specifications. Pipes Dimension ANSI/ ASME B36.19, B36.10, B2.1

Frequently Used Stainless Steel Pipe Grade 321 Types

321 Stainless Steel Pipes

321 Stainless Steel Pipes

SS 321 Seamless Pipes

SS 321 Seamless Pipes

ASME SA 312 TP 321H Tube

ASME SA 312 TP 321H Tube

SUS 321 Capillary Tubing

SUS 321 Capillary Tubing

321h Stainless Steel Pipes

321h Stainless Steel Pipes

Uns S32100 Seamless Pipe

Uns S32100 Seamless Pipe

SS 321 Welded Pipes

SS 321 Welded Pipes

SS WERKSTOFF NR. 1.4541 Pipes

SS WERKSTOFF NR. 1.4541 Pipes

321 Stainless Steel Round Pipes

321 Stainless Steel Round Pipes

ASTM A312 F321 Stainless Steel Round Pipes

ASTM A312 F321 Stainless Steel Round Pipes

Seamless SS 321 Tube

Seamless SS 321 Tube

SS 321 Square Pipes

SS 321 Square Pipes


ASTM A312 Tp321 Seamless pipe Size Chart

NPS OD SCH 5S SCH 10S SCH 40S SCH 80S
1/4 13.72 1.65 2.24 3.02
3/8 17.15 1.65 2.31 3.2
1/2 21.34 1.65 2.11 2.77 3.73
3/4 26.67 1.65 2.11 2.87 3.91
1 33.4 1.65 2.77 3.38 4.55
1.25 42.16 1.65 2.77 3.56 4.85
1.5 48.26 1.65 2.77 3.68 5.08
2 60.33 1.65 2.77 3.91 5.54
2.5 73.03 2.11 3.05 5.16 7.01
3 88.9 2.11 3.05 5.49 7.62
3.5 101.6 2.11 3.05 5.74 8.08
4 114.3 2.11 3.05 6.02 8.56
5 141.3 2.77 3.4 6.55 9.53
6 168.28 2.77 3.4 7.11 10.97
8 219.08 2.77 3.76 8.18 12.7
10 273.05 3.4 4.19 9.27 12.7
12 323.85 3.96 4.57 9.53 12.7
14 355.6 3.96 4.78 9.53 12.7
16 406.4 4.19 4.78 9.53 12.7
18 457.2 4.19 4.78 9.53 12.7
20 508 4.78 5.54 9.53 12.7
22 558.8 4.78 5.54
24 609.6 5.54 6.35 9.53 12.7
26 660.4
28 711.2
30 762 6.35 7.92

SA 312 TP 321 Welded pipe Dimension Chart

Pipe Size
(in)
Diameter
(in)
mm
Nominal Thickness
(in)

mm
Transverse Areas
(in2)
mm2
Length of Pipe
(ft per sq. foot of surface)
Volume
(ft3/ft)
Weight Number of Threads per inch of Screw
External Internal External Internal Steel External Surface
(ft)
Internal Surface
(ft)
(lb/ft) (kg/m)
1/8 0.405 0.27 0.07 0.13 0.06 0.07 9.43 14.20 0.0004 0.24 0.36 27
¼ 0.540 0.36 0.09 0.23 0.10 0.13 7.07 10.49 0.0007 0.42 0.63 18
3/8 0.675 0.49 0.09 0.36 0.19 0.17 5.66 7.75 0.0013 0.57 0.84 18
½ 0.840 0.62 0.11 0.55 0.30 0.25 4.55 6.14 0.0021 0.85 1.26 14
¾ 1.050 0.82 0.11 0.87 0.53 0.33 3.64 4.64 0.0037 1.13 1.68 14
1 1.315 1.05 0.13 1.36 0.86 0.49 2.90 3.64 0.0060 1.68 2.50 11 ½
1 ¼ 1.660 1.38 0.14 2.16 1.50 0.67 2.30 2.77 0.0104 2.27 3.38 11 ½
1 ½ 1.900 1.61 0.15 2.84 2.04 0.80 2.01 2.37 0.0141 2.72 4.04 11 ½
2 2.375 2.07 0.15 4.43 3.36 1.08 1.61 1.85 0.0233 3.65 5.43 11 ½
2 ½ 2.875 2.47 0.20 6.49 4.79 1.70 1.33 1.55 0.0333 5.79 8.62 8
3 3.500 3.07 0.22 9.62 7.39 2.23 1.09 1.25 0.0513 7.58 11.27 8
3 ½ 4.000 3.55 0.23 12.56 9.89 2.68 0.95 1.08 0.0687 9.11 13.56 8
4 4.500 4.03 0.24 15.90 12.73 3.17 0.85 0.95 0.0884 10.79 16.06 8
5 5.563 5.05 0.26 24.30 20.00 4.30 0.69 0.76 0.1389 14.61 21.74 8
6 6.625 6.07 0.28 34.47 28.89 5.58 0.58 0.63 0.2006 18.97 28.23 8
8 8.625 7.98 0.32 58.42 50.02 8.40 0.44 0.48 0.3552 28.55 42.49 8
10 10.750 10.02 0.37 90.76 78.85 11.90 0.36 0.38 0.5476 40.48 60.24 8
12 12.750 11.94 0.41 127.64 111.90 15.74 0.30 0.32 0.7763 53.60 79.77 8
14 14.000 13.13 0.44 153.94 135.30 18.64 0.27 0.28 0.9354 63.00 93.75 8
16 16.000 15.00 0.50 201.05 176.70 24.35 0.24 0.25 1.2230 78.00 116.08 8
18 18.000 16.88 0.56 254.85 224.00 30.85 0.21 0.23 1.5550 105.00 156.26 8
20 20.000 18.81 0.59 314.15 278.00 36.15 0.19 0.20 1.9260 123.00 183.05 8
24 24.000 22.63 0.69 452.40 402.10 50.30 0.16 0.17 2.7930 171.00 254.48 8

SS 321 Seamless Pipe Pressure Rating

A Wide Stock Of ASTM A312 Tp 321 Square Tube, SS 321 Seamless Pipe & Schedule 40 UNS S32100 Tubing In Our Mumbai Warehouse
Pipe Size
(inches)
Pipe Schedule Temperature (°F)
100 200 300 400 500 600 650 700 750
1" 40 3048 2629 2362 2171 2019 1924 1867 1824 1810
1" 80 4213 3634 3265 3002 2791 2659 2580 2528 2501
1" 160 6140 5296 4759 4375 4068 3876 3761 3684 3646
1.5" 40 2257 1947 1750 1608 1496 1425 1383 1354 1340
1.5" 80 3182 2744 2466 2267 2108 2009 1949 1909 1889
1.5" 160 4619 3984 3580 3291 3060 2916 2829 2772 2743
2" 40 1902 1640 1474 1355 1260 1201 1165 1141 1129
2" 80 2747 2369 2129 1957 1820 1734 1682 1648 1631
2" 160 4499 3880 3486 3205 2980 2840 2755 2699 2671
3" 40 1806 1558 1400 1287 1196 1140 1106 1084 1072
3" 80 2553 2202 1979 1819 1691 1612 1564 1532 1516
3" 160 3840 3312 2976 2736 2544 2424 2352 2304 2280
4" 40 1531 1321 1187 1091 1014 967 938 919 909
4" 80 2213 1909 1715 1577 1466 1397 1355 1328 1314
4" 160 3601 3106 2791 2566 2386 2273 2206 2161 2138
5" 40 1342 1158 1040 956 889 847 822 805 797
5" 80 1981 1709 1535 1411 1312 1250 1213 1189 1176
5" 160 3414 2945 2646 2433 2262 2155 2091 2049 2027
6" 40 1219 1052 945 869 808 770 747 732 724
6" 80 1913 1650 1483 1363 1267 1208 1172 1148 1136
6" 160 3289 2836 2549 2343 2179 2076 2014 1973 1953
8" 40 1073 926 832 765 711 678 657 644 637
8" 80 1692 1459 1311 1205 1121 1068 1036 1015 1005
8" 160 3175 2738 2460 2262 2103 2004 1944 1905 1885
10" 40 974 840 755 694 945 615 596 584 578
10" 80 1609 1388 1247 1147 1066 1016 986 966 956
10" 160 3147 2714 2439 2242 2085 1986 1927 1880 1868

ASTM A312 Grade TP321 ERW pipe Composition Standard

Grade C Mn Si P S Cr N Ni Ti
SS 321 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 – 19.00 0.10 max 9.00 – 12.00 5(C+N) – 0.70 max

Stainless Steel 321 Seamless Pipe Mechanical Strength

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1457 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

Equivalent Material of SS 321 Seamless Pipe

Buy Directly From 321 Stainless Steel Welded Pipe Manufacturers In India For Exact Sizes And Low Cost
STANDARD WERKSTOFF NR. UNS JIS EN
SS 321 1.4541 S32100 SUS 321 X6CrNiTi18-10

ASME SA 312 TP 321H Tube Tolerance

NPS ASTM A312 TP321 OD Tolerance
+
inch mm inch mm
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

Our Frequent supply of stainless steel 321 pipe in below countries

Dammam -KSA, Philippines, Indonesia, Belgium stainless steel 321 pipe
Qatar, Europe, France, Thailand 321 stainless steel tubing
Czechia, Thailand, Germany, Malaysia 321 stainless steel pipe
Malaysia, Bangladesh, USA, Finland 321 stainless pipe
South Africa, Kuwait, Saudi Arabia (KSA), Brazil ASTM A312 TP 321 SS Seamless Pipes
Bahrain, Singapore, South Africa, Singapore 321 Stainless Steel Welded Pipe
Philippines, UK, Australia, Nigeria SS UNS S32109 Welded 321 Pipe
Oman, Hong Kong, Malaysia, UAE Stainless Steel 321 Round Pipe
Chile, Iran, Italy, Singapore 20 inch SS 321 Seamless pipe
United Arab Emirates (UAE), Norway, Turkey, Malaysia Stainless Steel UNS S32100 Pipes
Netherlands, Russia, Malaysia, Dubai SS DIN 1.4541 Welded Pipes
Egypt, Mexico, Spain, UK Schedule 5 321 stainless steel pipe
United Kingdom -UK, Malaysia, Europe, UAE Thickness 9.0mm aisi 321 seamless stainless steel pipe
UK, Poland, Canada, Ellington -United States Astm 321 cold rolled stainless steel round pipes
Philippines, Canada, Malaysia, Singapore 321 mirror polished 400mm diameter SS pipe
Europe, Romania, Japan, Malaysia 8 inch welded 321 stainless steel pipe
Sweden, Malaysia, Colombia, China sa312 321 seamless stainless steel pipe
Malaysia, Los Alamos -Mexico, Taiwan, Philippines 321 stainless steel industrial pipe
Singapore, NY 12203 (USA), South Korea, Malaysia 321 thickness 0.3 0.6 tapered stainless steel pipe