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Pressure tables |
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| Selection of the appropriate material for any given control or chemical injection line is subject to the prevailing operational and site conditions. In order to assist in the selection, the following tables provide internal pressure ratings and the adjustments factors for a range of common grades and sizes of seamless and laser welded stainless tubing. | ||||||||||
| Maximum pressure (P) for TP 316L at 100°F (38°C)1) | ||||||||||
| Please refer to grade and product form adjustment factors below. | ||||||||||
| Outside diameter, in. | Wall thickness, in. | Working pressure2) | Burst pressure2) | Collapse pressure4) | ||||||
| psi (MPa) | psi (MPa) | psi (MPa) | ||||||||
| 1/4 | 0.035 | 6,600 (46) | 22,470 (155) | 6,600 (46) | ||||||
| 1/4 | 0.049 | 9,260 (64) | 27,400 (189) | 8,710 (60) | ||||||
| 1/4 | 0.065 | 12,280 (85) | 34,640 (239) | 10,750 (74) | ||||||
| 3/8 | 0.035 | 4,410 (30) | 19,160 (132) | 4,610 (32) | ||||||
| 3/8 | 0.049 | 6,170 (43) | 21,750 (150) | 6,220 (43) | ||||||
| 3/8 | 0.065 | 8,190 (56) | 25,260 (174) | 7,900 (54) | ||||||
| 3/8 | 0.083 | 10,450 (72) | 30,050 (207) | 9,570 (66) | ||||||
| 1/2 | 0.049 | 4,630 (32) | 19,460 (134) | 4,820 (33) | ||||||
| 1/2 | 0.065 | 6,140 (42) | 21,700 (150) | 6,200 (43) | ||||||
| 1/2 | 0.083 | 7,840 (54) | 24,600 (170) | 7,620 (53) | ||||||
| 5/8 | 0.049 | 3,700 (26) | 18,230 (126) | 3,930 (27) | ||||||
| 5/8 | 0.065 | 4,900 (34) | 19,860 (137) | 5,090 (35) | ||||||
| 5/8 | 0.083 | 6,270 (43) | 26,910 (151) | 6,310 (44) | ||||||
| 3/4 | 0.049 | 3,080 (21) | 17,470 (120) | 3,320 (23) | ||||||
| 3/4 | 0.065 | 4,090 (28) | 18,740 (129) | 4,310 (30) | ||||||
| 3/4 | 0.083 | 5,220 (36) | 20,310 (140) | 5,380 (37) | ||||||
| 1) Estimates only. Actual pressures should be calculated considering all stress factors in the system. | ||||||||||
| 2) Based on calculations from API 5C3, using a wall tolerance of +/-10% | ||||||||||
| 3) Based on ultimate strength burst calculations from API 5C3 | ||||||||||
| 4) Based on yield strength collapse calculations from API 5C3 | ||||||||||
| Adjustment factors for working pressure limits1) | ||||||||||
| Pw = reference working pressure rating for TP 316L at 100°F (38°C). To determine working pressure for grade/temperature combination, multiply Pw by adjustment factor. | ||||||||||
| Grade | 100°F | 200°F | 300°F | 400°F | ||||||
| (38°C) | (93°C) | (149°C) | (204°C) | |||||||
| TP 316L, seamless | 1 | 0.87 | 0.7 | 0.63 | ||||||
| TP 316L, welded | 0.85 | 0.74 | 0.6 | 0.54 | ||||||
| Alloy 825, seamless | 1.33 | 1.17 | 1.1 | 1.03 | ||||||
| Alloy 825, welded | 1.13 | 1.99 | 1.94 | 0.88 | ||||||
| 1) Adjustment factors based on allowable stress in ASME. | ||||||||||
| Adjustment factors for burst pressure limits1) | ||||||||||
| Pb = reference burst pressure for TP 316L at 100°F. To determine burst pressure for grade/temperature combination, multiply Pb by adjustment factor. | ||||||||||
| Grade | 100°F | 200°F | 300°F | 400°F | ||||||
| (38°C) | (93°C) | (149°C) | (204°C) | |||||||
| TP 316L, seamless | 1 | 0.93 | 0.87 | 0.8 | ||||||
| TP 316L, welded | 0.85 | 0.79 | 0.74 | 0.68 | ||||||
| Alloy 825, seamless | 1.13 | 1.07 | 1 | 0.87 | ||||||
| Alloy 825, welded | 0.96 | 0.91 | 0.85 | 0.74 | ||||||
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1) Adjustment factors based on ultimate strength in ASME. |
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