A335 P22 Pipe MAWP Calculator

ASTM A335 -P22 Alloy Steel Pipe SMLS 2 1/4Cr-1Mo

Pressure Ratings > Pipe MAWP > A335 P22

Material Properties

Specification

A335 P22

Description

ASTM A335 -P22 Alloy Steel Pipe SMLS 2 1/4Cr-1Mo

Tensile Strength

60 ksi

Yield Strength

30 ksi

B16.5 Flange Group

Group 1.10 — Alloy Steel 2¼Cr-1Mo

Min Design Temperature

-20 °F

Y Coefficient

Ref 3 — Ferritic 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 °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	6,226	6,060	5,993	5,960	5,960	5,960	5,893
1/4	0.54	6,438	6,020	5,859	5,794	5,762	5,762	5,762	5,698
3/8	0.675	5,210	4,872	4,741	4,689	4,663	4,663	4,663	4,611
1/2	0.84	4,995	4,671	4,546	4,496	4,471	4,471	4,471	4,421
3/4	1.05	4,074	3,809	3,707	3,666	3,646	3,646	3,646	3,605
1	1.315	3,810	3,562	3,467	3,429	3,410	3,410	3,410	3,372
1 1/4	1.66	3,137	2,933	2,855	2,823	2,808	2,808	2,808	2,776
1 1/2	1.9	2,822	2,638	2,568	2,540	2,526	2,526	2,526	2,497
2	2.375	2,377	2,223	2,163	2,140	2,128	2,128	2,128	2,104
2 1/2	2.875	2,600	2,431	2,366	2,340	2,327	2,327	2,327	2,301
3	3.5	2,258	2,111	2,054	2,032	2,020	2,020	2,020	1,998
3.5	4	2,059	1,925	1,874	1,853	1,843	1,843	1,843	1,822
4	4.5	1,914	1,789	1,742	1,723	1,713	1,713	1,713	1,694
5	5.563	1,678	1,569	1,527	1,510	1,502	1,502	1,502	1,485
6	6.625	1,524	1,425	1,387	1,372	1,364	1,364	1,364	1,349
7	7.625	1,421	1,329	1,293	1,279	1,272	1,272	1,272	1,257
8	8.625	1,342	1,255	1,221	1,208	1,201	1,201	1,201	1,187
9	9.625	1,275	1,192	1,161	1,148	1,141	1,141	1,141	1,129
10	10.75	1,217	1,138	1,108	1,096	1,089	1,089	1,089	1,077
12	12.75	1,051	983	956	946	941	941	941	930
14	14	955	893	869	860	855	855	855	846
16	16	834	780	759	751	746	746	746	738
18	18	740	692	673	666	662	662	662	655
20	20	665	622	605	598	595	595	595	589
22	22	604	565	549	543	540	540	540	534
24	24	553	517	503	498	495	495	495	489
26	26	510	477	464	459	456	456	456	451
28	28	473	442	431	426	424	424	424	419
30	30	441	413	402	397	395	395	395	391
36	36	367	343	334	331	329	329	329	325
42	42	314	294	286	283	281	281	281	278
44	44	300	281	273	270	269	269	269	266
46	46	287	268	261	258	257	257	257	254
48	48	275	257	250	247	246	246	246	243

Custom Wall Thickness

NPS

Wall Thickness (in)

Allowable Stress vs Temperature

Matching Flange Group

Group 1.10 — Alloy Steel 2¼Cr-1Mo(A182 F22 Cl.3, A217 WC9, A387-22)

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.