E-mail to us: info@hunanpipe.comSteel Pipes - Stainless Seamless Pipe

Specifications	Range
Out Diameter	1/8" through 24"
Wall Thickness	Schedules:5, 10, 10S, 20, 30, 40, 40S, 80, 80S
Length	3.0m-18m

Seamless Stainless Steel Pipe

Standards: ASTM A312,ASTM A358,ASTM A813,ASTM A814
300 Series Stainless Steel Grades: 304 – 304/L – 304H – 309/S – 309H – 310/S – 310H – 316L – 317L – 321 – 321H – 347 – 347H
400 Series Stainless Steel Grades: 410

Nickel Alloy Grades: Alloy 20 – 200 – 400 – 600 – 601 – 625 – 825H – 825HT – C276

Stainless Steel Seamless Pipe Tolerances

NPS Designator	Permissible Variations in Outside Diameter
	Over In.	Under In.
1/8 to 1-1/2, incl	1/64 (0.015)	1/32 (0.031)
Over 1-1/2 to 4, incl	1/32 (0.031)	1/32 (0.031)
Over 4 to 8, incl	1/16 (0.062)	1/32 (0.031)
Over 8 to 18, incl	3/23 (0.093)	1/32 (0.031)

Nominal Wall Thickness:

• Nominal Wall Tolerance Plus 12.5%, Minus 12.5%
• These do not conform to the American National Standard for Welded and Seamless Wrought Steel Pipe
  (ANSI B 36.10 – 1979)

NPS Designator	Outside Diameter in.	Schedule 10S in.	Schedule 40S in.	Schedule 80S in.	Schedule 160 in.	Schedule XX in.
1/4	0.540	0.065	0.088	0.119
3/8	0.675	0.065	0.091	0.126
1/2	0.840	0.083	0.109	0.147	.188	.294
3/4	1.050	0.083	0.113	0.154	.218	.308
1.0	1.315	0.109	0.133	0.179	.250	.358
1 1/4	1.660	0.109	0.140	0.191	.250	.382
1 1/2	1.900	0.109	0.145	0.200	.281	.400
2	2.375	0.109	0.154	0.218	.343	.436
2 1/2	2.875	0.120	0.203	0.276	.375	.552
3	3.500	0.120	0.216	0.300	.438	.600
3 1/2	4.000	0.120	0.226	0.318		.636
4	4.500	0.120	0.237	0.337	.534	.674
5	5.563	0.134	0.258	0.375	.625	.750
6	6.625	0.134	0.280	0.432	.719	.864
8	8.625	0.148	0.322	0.500	.906	.875
10	10.750	0.165	0.365	0.500	1.125
12	12.750	0.180	0.375	0.500	1.312
14	14.000	0.188	0.375	0.500	1.406
16	16.000	0.188	0.375	0.500	1.594

Minimum Wall Thickness on Inspection:

• The following equation, upon which this table is based, may be applied to calculate minimum wall thicknesses from nominal wall thickness:
  • tn * 0.875 = tm
    Where:
    tn = nominal wall thickness, in. [mm], and
    tm= minimum wall thicknesses, in. [mm]
  • The wall thickness is inch-pound units is rounded to three decimal places in accordance with the rounding method of Practice E29. The wall thickness in SI units is rounded to one decimal place in accordance with the rounding method of Practice E29.
• This table is a master table covering wall thicknesses available in the purchase of different classifications of pipe, but it is not meant to imply that all the walls listed herein are necessarily obtainable for the applicable product specification.

Nominal Thickness		Minimum Thickness on Inspection		Nominal Thickness		Minimum Thickness on Inspection		Nominal Thickness		Minimum Thickness on Inspection
in.	mm	in	mm	in	mm	in	mm	in	mm	in	mm
0.068	1.7	0.060	1.5	0.294	7.5	0.257	6.5	0.750	19.0	0.658	16.6
0.068	2.2	0.077	2.0	0.300	7.6	0.262	6.7	0.812	20.6	0.710	18.0
0.091	2.3	0.080	2.0	0.307	7.8	0.269	6.8	0.843	21.4	0.736	18.7
0.095	2.4	0.083	2.1	0.308	7.8	0.270	6.9	0.854	21.7	0.756	19.2
0.113	2.9	0.099	2.5	0.312	7.9	0.273	6.9	0.875	22.2	0.766	19.5
0.119	3.0	0.104	2.6	0.318	8.1	0.278	7.1	0.906	23.0	0.783	20.1
0.125	3.2	0.109	2.8	0.322	8.2	0.282	7.2	0.937	23.8	0.820	20.8
0.126	3.2	0.110	2.8	0.330	8.4	0.289	7.3	0.968	24.6	0.847	21.5
0.133	3.4	0.116	2.9	0.337	8.6	0.295	7.5	1.000	25.4	0.875	22.2
0.140	3.6	0.122	3.1	0.343	8.7	0.300	7.6	1.031	26.2	0.902	22.9
0.145	3.7	0.127	3.2	0.344	8.7	0.301	7.6	1.062	27.0	0.929	23.6
0.147	3.7	0.129	3.3	0.358	9.1	0.313	8.0	1.083	27.8	0.956	24.3
0.154	3.9	0.135	3.4	0.365	9.3	0.319	8.1	1.125	28.6	0.984	25.0
0.156	4.0	0.136	3.5	0.375	9.5	0.328	8.3	1.156	29.4	1.012	25.7
0.179	4.5	0.157	4.0	0.382	9.7	0.334	8.5	1.218	30.9	1.066	27.1
0.187	43.7	0.164	4.2	0.400	10.2	0.350	8.9	1.250	31.8	1.094	27.8
0.188	4.8	0.164	4.2	0.406	10.3	0.355	9.0	1.281	32.5	1.121	28.5
0.191	4.9	0.167	4.2	0.432	10.4	0.378	9.6	1.312	33.3	1.148	29.2
0.200	5.1	0.175	4.4	0.436	11.1	0.382	9.7	1.343	34.1	1.175	29.8
0.203	5.2	0.178	4.5	0.437	11.1	0.382	9.7	1.375	34.9	1.203	30.6
0.216	5.5	0.189	4.8	0.438	11.1	0.383	9.7	1.406	35.7	1.230	31.2
0.218	5.5	0.191	4.9	0.500	12.7	0.438	11.1	1.436	36.5	1.258	32.0
0.219	5.6	0.192	4.9	0.531	13.5	0.465	11.8	1.500	36.1	1.312	33.3
0.226	5.7	0.196	5.0	0.552	14.0	0.483	12.3	1.531	38.9	1.340	34.0
0.237	6.0	0.207	5.2	0.562	14.3	0.492	12.5	1.562	39.7	1.367	34.7
0.250	6.4	0.219	5.6	0.593	15.1	0.519	13.2	1.593	40.5	1.394	35.4
0.258	6.6	0.226	5.7	0.600	15.2	0.525	13.3	1.750	44.5	1.531	38.9
0.276	7.0	0.242	6.1	0.625	15.9	0.547	13.9	1.781	45.2	1.558	39.6
0.277	7.0	0.242	6.1	0.656	16.6	0.573	14.6	1.812	46.0	1.586	49.3
0.279	7.1	0.244	6.2	0.674	17.1	0.590	15.0	1.968	50.0	1.772	43.7
0.280	7.1	0.245	6.2	0.687	17.4	0.601	15.3	2.062	52.4	1.804	45.8
0.281	7.1	0.246	6.2	0.719	18.3	0.629	16.0	2.343	59.5	2.050	52.1