A335 P1 Pipe MAWP Calculator

ASTM A335 -P1 Alloy Steel Pipe SMLS C-1/2Mo

Pressure Ratings > Pipe MAWP > A335 P1

Material Properties

Specification

A335 P1

Description

ASTM A335 -P1 Alloy Steel Pipe SMLS C-1/2Mo

Tensile Strength

55 ksi

Yield Strength

30 ksi

B16.5 Flange Group

Group 1.5 — Alloy Steel C-½Mo

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 °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	6,093	6,093	5,993	5,794	5,627	5,461	5,227	4,961
1/4	0.54	5,891	5,891	5,794	5,601	5,440	5,279	5,054	4,796
3/8	0.675	4,767	4,767	4,689	4,533	4,403	4,272	4,090	3,882
1/2	0.84	4,571	4,571	4,496	4,346	4,221	4,096	3,921	3,722
3/4	1.05	3,727	3,727	3,666	3,544	3,442	3,340	3,198	3,035
1	1.315	3,486	3,486	3,429	3,314	3,219	3,124	2,991	2,838
1 1/4	1.66	2,870	2,870	2,823	2,729	2,651	2,572	2,463	2,337
1 1/2	1.9	2,582	2,582	2,540	2,455	2,384	2,314	2,215	2,102
2	2.375	2,175	2,175	2,140	2,068	2,009	1,949	1,866	1,771
2 1/2	2.875	2,379	2,379	2,340	2,262	2,197	2,132	2,041	1,937
3	3.5	2,066	2,066	2,032	1,964	1,908	1,851	1,772	1,682
3.5	4	1,884	1,884	1,853	1,791	1,740	1,688	1,616	1,534
4	4.5	1,751	1,751	1,723	1,665	1,617	1,569	1,502	1,426
5	5.563	1,535	1,535	1,510	1,460	1,418	1,376	1,317	1,250
6	6.625	1,395	1,395	1,372	1,326	1,288	1,250	1,197	1,136
7	7.625	1,300	1,300	1,279	1,236	1,201	1,165	1,115	1,059
8	8.625	1,228	1,228	1,208	1,167	1,134	1,100	1,053	1,000
9	9.625	1,167	1,167	1,148	1,110	1,078	1,046	1,001	950
10	10.75	1,114	1,114	1,096	1,059	1,029	998	956	907
12	12.75	962	962	946	914	888	862	825	783
14	14	874	874	860	831	807	783	750	712
16	16	763	763	751	726	705	684	655	621
18	18	677	677	666	644	625	607	581	551
20	20	608	608	598	579	562	545	522	495
22	22	552	552	543	525	510	495	474	450
24	24	506	506	498	481	467	453	434	412
26	26	467	467	459	444	431	418	400	380
28	28	433	433	426	412	400	388	371	353
30	30	404	404	397	384	373	362	346	329
36	36	336	336	331	320	310	301	288	274
42	42	288	288	283	274	266	258	247	234
44	44	275	275	270	261	254	246	236	224
46	46	263	263	258	250	242	235	225	214
48	48	252	252	247	239	232	225	216	205

Custom Wall Thickness

NPS

Wall Thickness (in)

Allowable Stress vs Temperature

Matching Flange Group

Group 1.5 — Alloy Steel C-½Mo(A182 F1, A204 A/B)

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.