Stainless Steel 321 Seamless Pipe

We have Answers

+91 22 6636 3237
rahul@perfectimpex.net

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.

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

Table of Content

Specification Chart of Stainless Steel 321 Pipe
Frequently Used Stainless Steel Pipe Grade 321 Types
ASTM A312 Tp321 Seamless pipe Size Chart
SA 312 TP 321 Welded pipe Dimension Chart
SS 321 Seamless Pipe Pressure Rating
ASTM A312 Grade TP321 ERW pipe Composition Standard
Stainless Steel 321 Seamless Pipe Mechanical Strength
Equivalent Material of SS 321 Seamless Pipe
ASME SA 312 TP 321H Tube Tolerance
Our Frequent supply of stainless steel 321 pipe in below countries

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

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
Pipe Size (in)	External	Internal	Nominal Thickness (in) mm	External	Internal	Steel	External Surface (ft)	Internal Surface (ft)	Volume (ft3/ft)	(lb/ft)	(kg/m)	Number of Threads per inch of Screw
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)
Pipe Size (inches)	Pipe Schedule	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