A312 TP347 Pipe MAWP Calculator

ASTM A312 TP347 SS Pipe Smls 18Cr-10Ni-Cb

Pressure Ratings > Pipe MAWP > A312 TP347

Material Properties

Specification

A312 TP347

Description

ASTM A312 TP347 SS Pipe Smls 18Cr-10Ni-Cb

Tensile Strength

75 ksi

Yield Strength

30 ksi

B16.5 Flange Group

Group 2.5 — Austenitic SS 18Cr-10Ni-Cb

Min Design Temperature

-425 °F

Y Coefficient

Ref 4 — Austenitic steels

Calculator Settings

Corrosion Allowance (in)

Mill Tolerance (%)

Units

Schedule Selection

STDXSXXS10S40S80S2030406080120140160

Temperature Selection

100 °F150 °F200 °F250 °F300 °F350 °F400 °F450 °F500 °F550 °F600 °F650 °F700 °F750 °F800 °F850 °F900 °F950 °F1000 °F1050 °F1100 °F1150 °F1200 °F1250 °F1300 °F1350 °F1400 °F1450 °F1500 °F

Maximum Allowable Working Pressure (psig)

NPS	OD (in)	100 °F	200 °F	300 °F	400 °F	500 °F	600 °F	700 °F	800 °F
1/8	0.405	6,659	6,659	6,659	6,659	6,659	6,426	6,226	6,093
1/4	0.54	6,438	6,438	6,438	6,438	6,438	6,213	6,020	5,891
3/8	0.675	5,210	5,210	5,210	5,210	5,210	5,028	4,872	4,767
1/2	0.84	4,995	4,995	4,995	4,995	4,995	4,821	4,671	4,571
3/4	1.05	4,074	4,074	4,074	4,074	4,074	3,931	3,809	3,727
1	1.315	3,810	3,810	3,810	3,810	3,810	3,676	3,562	3,486
1 1/4	1.66	3,137	3,137	3,137	3,137	3,137	3,027	2,933	2,870
1 1/2	1.9	2,822	2,822	2,822	2,822	2,822	2,723	2,638	2,582
2	2.375	2,377	2,377	2,377	2,377	2,377	2,294	2,223	2,175
2 1/2	2.875	2,600	2,600	2,600	2,600	2,600	2,509	2,431	2,379
3	3.5	2,258	2,258	2,258	2,258	2,258	2,179	2,111	2,066
3.5	4	2,059	2,059	2,059	2,059	2,059	1,987	1,925	1,884
4	4.5	1,914	1,914	1,914	1,914	1,914	1,847	1,789	1,751
5	5.563	1,678	1,678	1,678	1,678	1,678	1,619	1,569	1,535
6	6.625	1,524	1,524	1,524	1,524	1,524	1,471	1,425	1,395
7	7.625	1,421	1,421	1,421	1,421	1,421	1,371	1,329	1,300
8	8.625	1,342	1,342	1,342	1,342	1,342	1,295	1,255	1,228
9	9.625	1,275	1,275	1,275	1,275	1,275	1,231	1,192	1,167
10	10.75	1,217	1,217	1,217	1,217	1,217	1,175	1,138	1,114
12	12.75	1,051	1,051	1,051	1,051	1,051	1,014	983	962
14	14	955	955	955	955	955	922	893	874
16	16	834	834	834	834	834	805	780	763
18	18	740	740	740	740	740	714	692	677
20	20	665	665	665	665	665	642	622	608
22	22	604	604	604	604	604	583	565	552
24	24	553	553	553	553	553	534	517	506
26	26	510	510	510	510	510	492	477	467
28	28	473	473	473	473	473	457	442	433
30	30	441	441	441	441	441	426	413	404
36	36	367	367	367	367	367	354	343	336
42	42	314	314	314	314	314	303	294	288
44	44	300	300	300	300	300	290	281	275
46	46	287	287	287	287	287	277	268	263
48	48	275	275	275	275	275	265	257	252

Custom Wall Thickness

NPS

Wall Thickness (in)

Allowable Stress vs Temperature

Matching Flange Group

Group 2.5 — Austenitic SS 18Cr-10Ni-Cb(A182 F347/F347H/F348, A240-347/348)

Disclaimer: This calculator is for guidance only. Results are based on ASME B31.3-2024 allowable stresses for seamless pipe (Ej=1.0, W=1.0). Always verify against the current edition of the standard. The engineer of record is responsible for all design decisions.