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API Trim Chart
| API Trim Family | API Trim No. | Material Type | Nominal Trim | Stem | Disc/Wedge Surface | Seat Surface | Acceptable API Trim Alternatives |
|---|---|---|---|---|---|---|---|
| Martensitic Stainless Steel | 1* | 13Cr | 410 | 410 SS | F6 | 410 SS | – |
| Martensitic Stainless Steel | 8 | 13Cr | 410 Hardfaced | 410 SS | F6 | Stellite 6 | 5 |
| Martensitic Stainless Steel | 5 | 13Cr | 410 Full Hardfaced | 410 SS | Stellite 6 | Stellite 6 | – |
| Austenitic Stainless Steel | 10 | 18Cr-8Ni-Mo | 316 | 316 SS | 316 SS | 316 SS | 12 or 16 |
| Austenitic Stainless Steel | 12 | 18Cr-8Ni-Mo | 316 Hardfaced | 316 SS | 316 SS | Stellite 6 | 16 |
| Austenitic Stainless Steel | 16 | 18Cr-8Ni-Mo | 316 Full Hardfaced | 316 SS | Stellite 6 | Stellite 6 | – |
| Monel™ | 9 | Ni-Cu Alloy | Monel | Monel | Monel | Monel | – |
| Monel™ | 11 | Ni-Cu Alloy | Monel Hardfaced | Monel | Monel | Stellite 6 | – |
| Alloy 20 | 13 | 19Cr-29Ni | Alloy 20 | Alloy 20 | Alloy 20 | Alloy 20 | 14 |
| Alloy 20 | 14 | 19Cr-29Ni | Alloy 20 Hardfaced | Alloy 20 | Alloy 20 | Stellite 6 | – |
| Alloy 20 | 18 | 19Cr-29Ni | Alloy 20 Full Hardfaced | Alloy 20 | Stellite 6 | Stellite 6 | – |
- *Trim 1 is listed as obsolete for API 600, and no longer included in API 602
- Trim 5A and 8A apply Ni-Cr alloy hardfacing instead of typical Co-Cr Stellite 6 hardfacing
- Trim materials noted are nominal, and data provided in this chart is for informational purposes only. Always consult API to verify information via current API publications and data
API 598 – Pressure Test Requirements
| Test | Size | ASME Class | Gate | Globe and Parallel Slide Gate | Plug | Check | Floating Ball | Butterfly & Trunnion Mounted Ball |
|---|---|---|---|---|---|---|---|---|
| Shell | All | All | Required | Required | Required | Required | Required | Required |
| Backseat | All | All | Required | Required | N/A | N/A | N/A | N/A |
| Low Pressure Closure | ≤ 4 NPS | ≤ CL1500 | Required | Optional | Required | Optional | Required | Required |
| Low Pressure Closure | ≤ 4 NPS | > CL1500 | Optional | Optional | Optional | Optional | Required | Optional |
| Low Pressure Closure | > 4 NPS | ≤ CL600 | Required | Optional | Required | Optional | Required | Required |
| Low Pressure Closure | > 4 NPS | > CL600 | Optional | Optional | Optional | Optional | Required | Optional |
| High Pressure Closure | ≤ 4 NPS | ≤ CL1500 | Optional | Required | Optional | Required | Optional | Optional |
| High Pressure Closure | ≤ 4 NPS | > CL1500 | Required | Required | Required | Required | Optional | Required |
| High Pressure Closure | > 4 NPS | ≤ CL600 | Optional | Required | Optional | Required | Optional | Optional |
| High Pressure Closure | > 4 NPS | > CL600 | Required | Required | Required | Required | Optional | Required |
| High- Pressure Pneumatic Shell Test | All | All | Optional* | Optional* | Optional* | Optional* | Optional* | Optional* |
* Optional – Must be specified in purchase order
API Valve Specifications
| Standard | Title |
|---|---|
| API 6D | Specification for Pipeline and Piping Valves |
| API 594 | Check Valves: Flanged, Lug, Wafer, and Butt-welding |
| API 598 | Valve Inspection and Testing |
| API 600 | Steel Gate Valves – Flanged and Butt-welding Ends, Bolted Bonnets |
| API 602 | Gate, Globe, and Check Valves for Sizes DN 100 (NPS 4) and Smaller for the Petroleum and Natural Gas Industries |
| API 603 | Corrosion-resistant, Bolted Bonnet Gate Valves – Flanged and Butt-welding Ends |
| API 607 | Fire Test for Quarter-turn Valves and Valves Equipped with Non-Metallic Seats |
| API 608 | Metal Ball Valves-Flanged, Threaded and Welding Ends |
| API 609 | Butterfly Valves: Double-flanged, Lug and Wafer Type |
| API 622 | Type Testing of Process Valve Packing for Fugitive Emissions |
| API 623 | Steel Globe Valves – Flanged and Butt-welding Ends, Bolted Bonnets |
| API 624 | Type Testing of Rising Stem Valves Equipped with Graphite Packing for Fugitive Emissions |
| API 641 | Type Testing of Quarter-turn Valves for Fugitive Emissions |
ASME Class to Cold Working Pressure
| ASME Class | Group 1.1 Materials A105, A216 WCB, A350 LF2 Cold Working Pressure (psig) | Group 1.2 Materials A352 LCC Cold Working Pressure (psig) | Group 2.2 Materials A182 F316 Cold Working Pressure (psig) |
|---|---|---|---|
| CL150 | 285 | 290 | 275 |
| CL300 | 740 | 750 | 720 |
| CL400 | 985 | 1,000 | 960 |
| CL600 | 1,480 | 1,500 | 1,440 |
| CL800 | 1,975 | 2,000 | 1,920 |
| CL900 | 2,220 | 2,250 | 2,160 |
| CL1500 | 3,705 | 3,750 | 3,600 |
| CL2500 | 6,170 | 6,250 | 6,000 |
- Cold working pressures include -20°F to 100°F (-29°C to 38°C) – Refer to ASME 34 outside this range
- CL800 is an intermediate pressure class widely used for socket weld and threaded end connections, as per API 602.
NPS to DN to OD
| NPS | DN | OD (mm) | OD (in) |
|---|---|---|---|
| 1/4 | 8 | 13.7 | 0.540 |
| 3/8 | 10 | 17.1 | 0.675 |
| 1/2 | 15 | 21.3 | 0.840 |
| 3/4 | 20 | 26.7 | 1.050 |
| 1 | 25 | 33.4 | 1.315 |
| 1-1/4 | 32 | 40.6 | 1.660 |
| 1-1/2 | 40 | 48.3 | 1.900 |
| 2 | 50 | 60.3 | 2.375 |
| 2-1/2 | 65 | 73.0 | 2.875 |
| 3 | 80 | 88.9 | 3.500 |
| 3-1/2 | 90 | 101.6 | 4.000 |
| 4 | 100 | 114.3 | 4.500 |
| 6 | 150 | 141.3 | 6.625 |
| 8 | 200 | 219.1 | 8.625 |
| 10 | 250 | 273.1 | 10.75 |
| 12 | 300 | 323.9 | 12.75 |
| 14 | 350 | 355.6 | 14.00 |
| 16 | 400 | 406.4 | 16.00 |
| 18 | 450 | 457.0 | 18.00 |
| 20 | 500 | 508.0 | 20.00 |
| 24 | 600 | 610.0 | 24.00 |
Pipe Schedule (Inches)
| NPS | OD | Wall Thickness | ||||||
|---|---|---|---|---|---|---|---|---|
| STD | SCH40 | XS (XH) | SCH80 | SCH120 | SCH160 | XXS (XXH) | ||
| 1/2 | 0.840 | 0.109 | 0.109 | 0.147 | 0.147 | – | 0.187 | 0.294 |
| 3/4 | 1.050 | 0.113 | 0.113 | 0.154 | 0.154 | – | 0.218 | 0.308 |
| 1 | 1.315 | 0.133 | 0.133 | 0.179 | 0.179 | – | 0.250 | 0.358 |
| 1 1/4 | 1.660 | 0.140 | 0.140 | 0.191 | 0.191 | – | 0.250 | 0.382 |
| 1 1/2 | 1.900 | 0.145 | 0.145 | 0.200 | 0.200 | – | 0.281 | 0.400 |
| 2 | 2.375 | 0.154 | 0.154 | 0.218 | 0.218 | – | 0.344 | 0.436 |
| 2 1/2 | 2.875 | 0.203 | 0.203 | 0.276 | 0.276 | – | 0.375 | 0.552 |
| 3 | 3.500 | 0.216 | 0.216 | 0.300 | 0.300 | – | 0.438 | 0.600 |
| 3 1/2 | 4.000 | 0.226 | 0.226 | 0.318 | 0.318 | – | – | 0.636 |
| 4 | 4.500 | 0.237 | 0.237 | 0.337 | 0.337 | 0.438 | 0.531 | 0.674 |
| 6 | 6.625 | 0.280 | 0.280 | 0.432 | 0.432 | 0.562 | 0.719 | 0.864 |
| 8 | 8.625 | 0.322 | 0.322 | 0.500 | 0.500 | 0.719 | 0.906 | 0.875 |
| 10 | 10.75 | 0.365 | 0.365 | 0.500 | 0.594 | 0.844 | 1.125 | 1.000 |
| 12 | 12.75 | 0.375 | 0.406 | 0.500 | 0.688 | 1.000 | 1.312 | 1.000 |
| 14 | 14.00 | 0.375 | 0.438 | 0.500 | 0.750 | 1.093 | 1.406 | – |
| 16 | 16.00 | 0.375 | 0.500 | 0.500 | 0.844 | 1.218 | 1.594 | – |
| 18 | 18.00 | 0.375 | 0.562 | 0.500 | 0.938 | 1.375 | 1.781 | – |
| 20 | 20.00 | 0.375 | 0.594 | 0.500 | 1.031 | 1.500 | 1.969 | – |
| 24 | 24.00 | 0.375 | 0.688 | 0.500 | 1.219 | 1.812 | 2.344 | – |
ASME B16.25 includes dimensions and tolerances of butt-weld end connections of piping components
Trunnion Ball Valve Types
| Valve Type | Seat 1 | Seat 2 |
|---|---|---|
| DBB | Single Piston Effect (SPE) | Single Piston Effect (SPE) |
| DIB-1 | Double Piston Effect (DPE) | Double Piston Effect (DPE) |
| DIB-2 | Single Piston Effect (SPE) | Double Piston Effect (DPE) |
Pressure (PSIG) – Temperature Ratings for Class 150 Valves
| Temperature | 304ss | 316ss | 317ss | 254 SMO | Inconel 600 | Hastelloy C276 | Alloy 20 | 2205ss | 2507ss | WCB | LCC |
|---|---|---|---|---|---|---|---|---|---|---|---|
| -29 C / -20 F | 275 | 275 | 275 | 290 | 290 | 230 | 230 | 290 | 290 | 285 | 290 |
| 38 C / 100 F | 275 | 275 | 275 | 290 | 290 | 230 | 230 | 290 | 290 | 285 | 290 |
| 93 C / 200 F | 230 | 235 | 235 | 260 | 260 | 210 | 200 | 260 | 260 | 260 | 260 |
| 149 C / 300 F | 205 | 215 | 215 | 230 | 230 | 200 | 180 | 230 | 230 | 230 | 230 |
| 204 C / 400 F | 190 | 195 | 195 | 200 | 200 | 190 | 160 | 200 | 200 | 200 | 200 |
| 260 C / 500 F | 170 | 170 | 170 | 170 | 170 | 170 | 150 | 170 | 170 | 170 | 170 |
| 316 C / 600 F | 140 | 140 | 140 | 140 | 140 | 140 | 140 | 140 | 140 | 140 | 140 |
| 343 C / 650 F | 125 | 125 | 125 | 125 | 125 | 125 | 125 | 125 | 125 | 125 | |
| 371 C / 700 F | 110 | 110 | 110 | 110 | 110 | 110 | 110 | 110 | 110 | 110 | |
| 399 C / 750 F | 95 | 95 | 95 | 95 | 95 | 95 | 95 | 95 | 95 | 95 | |
| 427 C / 800 F | 80 | 80 | 80 | 80 | 80 | 80 | 80 | ||||
| 454 C / 850 F | 65 | 65 | 65 | 65 | 65 | 65 | 65 | ||||
| 482 C / 900 F | 50 | 50 | 50 | 50 | 50 | 50 | 50 | ||||
| 510 C / 950 F | 35 | 35 | 35 | 35 | 35 | 35 | 35 | ||||
| 538 C / 1000 F | 20 | 20 | 20 | 20 | 20 | 20 | 20 | ||||
| 566 C / 1050 F | 20 (2) | 20 | 20 | 20 (2) | 20 (2) | ||||||
| 593 C / 1100 F | 20 (2) | 20 (2) | 20 (2) | 20 (2) | 20 (2) | ||||||
| 621 C / 1150 F | 20 (2) | 20 (2) | 20 (2) | 20 (2) | 20 (2) | ||||||
| 649 C / 1200 F | 20 (2) | 20 (2) | 20 (2) | 20 (2) | 20 (2) | ||||||
| 677 C / 1250 F | 20 (2) | 20 (2) | 20 (2) | 20 (2) | |||||||
| 704 C / 1300 F | 20 (2) | 20 (2) | 20 (2) | 20 (2) | |||||||
| 732 C / 1350 F | 20 (2) | 20 (2) | 20 (2) | 20 (2) | |||||||
| 760 C / 1400 F | 20 (2) | 20 (2) | 20 (2) | 20 (2) | |||||||
| 788 C / 1450 F | 20 (2) | 20 (2) | 20 (2) | 20 (2) | |||||||
| 816 C / 1500 F | 15 (2) | 15 (2) | 15 (2) | 15 (2) |
(1) At temperatures over 1,000°F, use only when the carbon content is 0.04% or higher.
(2) Flanged-end valve ratings terminate at 1,000°F.
(3) Not to be used over 1,000°F.
(4) Use annealed material only.
(5) Use solution annealed material only.
(6) This steel may become brittle after service at moderately elevated temperatures. Not to be used over 600°F.
(7) Upon prolonged exposure to temperatures above 800°F, the carbide phase of steel may be converted to graphite. Permissible, but not
recommended for prolonged use above 800°F.
(8) Not to be used over 650°F.
Pressure (PSIG) – Temperature Ratings for Class 300 Valves
| Temperature | 304ss | 316ss | 317ss | 254 SMO | Inconel 600 | Hastelloy C276 | Alloy 20 | 2205ss | 2507ss | WCB | LCC |
|---|---|---|---|---|---|---|---|---|---|---|---|
| -29 °C / -20 °F | 720 | 720 | 720 | 750 | 750 | 600 | 600 | 750 | 750 | 740 | 750 |
| 38 °C / 100 °F | 720 | 720 | 720 | 750 | 750 | 600 | 520 | 750 | 750 | 740 | 750 |
| 93 °C / 200 °F | 600 | 620 | 620 | 745 | 750 | 550 | 465 | 745 | 745 | 680 | 750 |
| 149 °C / 300 °F | 540 | 560 | 560 | 665 | 730 | 520 | 420 | 665 | 665 | 655 | 730 |
| 204 °C / 400 °F | 495 | 515 | 515 | 615 | 705 | 490 | 390 | 615 | 615 | 635 | 705 |
| 260 °C / 500 °F | 465 | 480 | 480 | 580 | 665 | 465 | 360 | 580 | 580 | 605 | 665 |
| 316 °C / 600 °F | 440 | 450 | 450 | 555 | 605 | 440 | 555 | 555 | 570 | 605 | |
| 343 °C / 650 °F | 430 | 440 | 440 | 545 | 590 | 430 | 545 | 545 | 550 | 590 | |
| 371 °C / 700 °F | 420 | 435 | 435 | 540 | 570 | 420 | 540 | 540 | 530 | 555 | |
| 399 °C / 750 °F | 415 | 425 | 425 | 530 | 530 | 410 | 530 | 530 | 505 | 505 | |
| 427 °C / 800 °F | 405 | 420 | 420 | 510 | 400 | 410 | 410 | ||||
| 454 °C / 850 °F | 395 | 420 | 420 | 485 | 395 | 320 | 320 | ||||
| 482 °C / 900 °F | 390 | 415 | 415 | 450 | 385 | 230 | 225 | ||||
| 510 °C / 950 °F | 380 | 385 | 385 | 365 | 380 | 135 | 135 | ||||
| 538 °C / 1000 °F | 355 | 365 | 365 | 240 | 365 | 85 | 85 | ||||
| 566 °C / 1050 °F | 325 | 360 | 360 | 155 | 350 | ||||||
| 593 °C / 1100 °F | 255 | 305 | 305 | 105 | 325 | ||||||
| 621 °C / 1150 °F | 205 | 235 | 235 | 75 | 275 | ||||||
| 649 °C / 1200 °F | 165 | 185 | 185 | 70 | 205 | ||||||
| 677 °C / 1250 °F | 135 | 145 | 145 | 180 | |||||||
| 704 °C / 1300 °F | 115 | 115 | 115 | 140 | |||||||
| 732 °C / 1350 °F | 95 | 95 | 95 | 105 | |||||||
| 760 °C / 1400 °F | 75 | 75 | 75 | 75 | |||||||
| 788 °C / 1450 °F | 60 | 60 | 60 | 60 | |||||||
| 816 °C / 1500 °F | 40 | 40 | 40 | 40 |
(1) At temperatures over 1,000°F, use only when the carbon content is 0.04% or higher.
(2) Flanged-end valve ratings terminate at 1,000°F.
(3) Not to be used over 1,000°F.
(4) Use annealed material only.
(5) Use solution annealed material only.
(6) This steel may become brittle after service at moderately elevated temperatures. Not to be used over 600°F.
(7) Upon prolonged exposure to temperatures above 800°F, the carbide phase of steel may be converted to graphite. Permissible, but not
recommended for prolonged use above 800°F.
(8) Not to be used over 650°F.
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