Powell Valves - Pressure/Temperature Charts

Table 2 - ASTM A216 Grade WC6

Use normalized and tempered material only. Not to be used over 1100°F.

Standard Class

Working Pressures by Classes, psig
Temperature, °F	150	300	400	600	900	1500	2500	4500
-20 to 100	290	750	1000	1500	2250	3750	6250	11,250
200	260	750	1000	1500	2250	3750	6250	11,250
300	230	720	965	1445	2165	3610	6015	10,830
400	200	695	925	1385	2080	3465	5775	10,400
500	170	695	885	1330	1995	3325	5540	9965
600	140	605	805	1210	1815	3025	5040	9070
650	125	590	785	1175	1765	2940	4905	8825
700	110	570	755	1135	1705	2840	4730	8515
750	95	530	710	1065	1595	2660	4460	7970
800	80	510	675	1015	1525	2540	4230	7610
850	65	485	650	975	1460	2435	4060	7305
900	50	450	600	900	1350	2245	3748	6740
950	35	320	425	640	955	1595	2655	4785
1000	20	215	290	430	650	1080	1800	3240
1050	20(1)	145	790	290	430	720	1200	2160
1100	20(1)	95	130	190	290	480	800	1440

NOTE: (1) For welding end valves only. Flanged end ratings terminate at 1000°F


Special Class

Working Pressures by Classes, psig
Temperature, °F	150	300	400	600	900	1500	2500	4500
-20 to 100	290	750	1000	1500	2250	3750	6250	11,250
200	290	750	1000	1500	2250	3750	6250	11,250
300	290	750	1000	1500	2250	3750	6250	11,250
400	290	750	1000	1500	2250	3750	6250	11,250
500	290	750	1000	1500	2250	3750	6250	11,250
600	290	750	1000	1500	2250	3750	6250	11,250
650	290	750	1000	1500	2250	3750	6250	11,250
700	280	735	980	1465	2200	3665	6110	10,995
750	280	730	970	1460	2185	3645	6070	10,930
800	275	720	960	1440	2160	3600	6000	10,800
850	260	680	905	1355	2030	3385	5645	10,160
900	225	585	785	1175	1760	2935	4895	8805
950	155	400	530	795	1195	1995	3320	5980
1000	105	270	360	540	810	1350	2250	4050
1050	70	180	240	360	540	900	1500	2700
1100	45	120	160	240	360	600	1000	1800

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