Powell Valves - Pressure/Temperature Charts

Table 8 - ASTM A351 Grade CF3M(a) & ASTM A351 Grade CF8M(b)

(a) Not to be used over 800°F
(b) At temperatures over 1000°F, use only when the carbon content is 0.04% or higher. This requirement must be specified by customer when applicable.

Standard Class

Working Pressures by Classes, psig
Temperature, °F(2)	150	200	300	400	600	900	1500	2500	4500
-20 to 100	275	400	720	960	1440	2160	3600	6000	10,800
200	235	360	620	825	1240	1860	3095	5160	9290
300	215	330	560	745	1120	1680	2795	4660	8390
400	195	300	515	685	1025	1540	2570	4280	7705
500	170	270	480	635	955	1435	2390	3980	7165
600	140	240	450	600	900	1355	2255	3760	6770
650	125	230	445	590	890	1305	2170	3700	6660
700	110	215	430	580	870	1305	2170	3620	6515
750	95	205	425	570	855	1280	2135	3560	6410
800	80	190	420	565	845	1265	2110	3520	6335
850	65	180	420	555	835	1255	2090	3480	6265
900	50	170	415	555	830	1245	2075	3460	6230
950	35	150	385	515	775	1160	1930	3220	5795
1000	20	130	350	465	700	1050	1750	2915	5245
1050	20(1)	125	345	450	685	1030	1720	2865	5155
1100	20(1)	115	305	405	610	915	1525	2545	4575
1150	20(1)	90	235	315	475	710	1185	1970	3550
1200	20(1)	75	185	245	370	555	925	1545	2885
1250	20(1)	60	145	195	295	440	735	1230	2210
1300	20(1)	50	115	155	235	350	585	970	1750
1350	20(1)	45	95	130	190	290	480	800	1440
1400	20(1)	35	75	100	150	225	380	630	1130
1450	20(1)	30	60	80	115	175	290	485	875
1500	20(1)	25	40	55	85	125	205	345	620

NOTE:
(1) For welding end valves only. Flanged end ratings terminate at 1000°F.
(2) For Cryogenic Valves, -20°F Rating Extends to -423°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	265	690	920	1380	2070	3450	5750	10,350
300	240	625	830	1250	1870	3120	5200	9365
400	220	570	760	1140	1710	2850	4750	8550
500	205	530	710	1065	1595	2655	4430	7970
600	195	505	670	1005	1510	2520	4195	7555
650	190	495	655	985	1480	2465	4105	7395
700	185	485	645	970	1455	2420	4035	7265
750	180	475	635	950	1425	2380	3965	7135
800	180	470	630	945	1415	2355	3930	7070
850	180	465	620	930	1400	2330	3885	6990
900	175	465	615	925	1390	2315	3855	6945
950	175	460	610	915	1375	2290	3815	6870
1000	160	420	560	840	1260	2105	3505	6310
1050	160	420	560	840	1260	2105	3505	6310
1100	145	380	510	765	1145	1905	3180	5720
1150	115	295	395	590	885	1480	2465	4435
1200	90	230	310	465	695	1155	1930	3470
1250	70	185	245	370	555	920	1535	2765
1300	55	145	195	290	435	730	1215	2185
1350	45	120	160	240	360	600	1000	1800
1400	35	95	125	190	285	470	785	1415
1450	30	75	100	145	220	365	610	1095
1500	20	50	70	105	155	260	430	770

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