Powell Valves - Pressure/Temperature Charts

Table 9 - ASTM A351-Grade CN7M

Use solution annealed material only.

Standard Class

Working Pressures by Classes, psig
Temperature, °F(2)	150	300	400	600	900	1500	2500	4500
-20 to 100	230	600	800	1200	1800	3000	5000	9000
200	200	520	690	1035	1555	2590	4320	7775
300	180	465	620	930	1395	2330	3880	6985
400	160	420	565	845	1265	2110	3520	6335
500	150	390	520	780	1165	1945	3240	5830
600	140	360	480	720	1080	1800	3000	5400

Special Class

Working Pressures by Classes, psig
Temperature, °F	150	300	400	600	900	1500	2500	4500
-20 to 100	255	665	885	1330	1995	3320	5535	9965
200	215	560	750	1125	1685	2805	4680	8420
300	195	510	680	1020	1530	2550	4250	7650
400	180	470	630	945	1415	2355	3930	7070
500	165	435	580	870	1300	2170	3615	7070
600	155	400	535	805	1205	2010	3350	6025

NOTE: Special Class Ratings apply to Threaded and Weld End Valves only and require upgrading per paragraph 8 of ASME B16.34