High Pressure Fluid System Components
South Coast Industrial Metals supplies the tubing and accessories that are required for high pressure applications. Medium Pressure (up to 20,000 psi), High Pressure (30,000 through 60,000 psi), and Ultra High Pressure (100,000 through 150,000 psi) solutions are offered for tubing, valves, and fittings. Tubes are provided at random lengths between 20′ and 25′ long and are available in 304, 316/L, and 317L grade stainless steel. DK-Lok high pressure series valves and fittings are made of 316 cold-worked stainless steel and are a cone and thread design available in multiple configurations. South Coast Industrial Metals has the material for your high pressure applications under control.
Production Specifications: ASTM A213 / ASTM A269 / NACE MR0175
| Chemical Composition % | Cr | Ni | C | Mg | Mo | Si | P | S |
| 304 (UNS S30400) | 18.0 – 20.0 | 8.0 – 11.0 | 0.08 (max) | 2.00 | -. | 1.00 | 0.045 (max) | .030 (max) |
| 316/L (UNS S31600 / S31603) | 16.0 – 18.0 | 10.0 – 14.0 | 0.03 (max) | 2.00 | 2.0 – 3.0 | 1.00 | 0.045 (max) | .030 (max) |
| 317L (UNS S31703) | 18.0 – 20.0 | 11.0 – 15.0 | .035 (max) | 2.00 | 3.0 – 4.0 | 1.00 | 0.045 (max) | .030 (max) |
Mechanical Properties and Fabrication:
The high pressure product line consists of special property combinations (available on request) to create unique tensile, yield, and elongation characteristics in the 1/8 hard condition. The tubing is bright annealed during the process, omitting the last production pass. A cone and thread tool can be used to prep the tubing for fitting and valve installation and is available for purchase.
Medium Pressure
Tubing Sizes and Pressure Ratings:
| Nominal OD† | OD Tolerance | ID Range | Pressure Rating* |
| 1/4″ | – 0.007″ / + 0.0″ | .104″ / .109″ | 20,000 psi |
| 3/8″ | – 0.010″ / + 0.0″ | .198″ / .203″ | 20,000 psi |
| 9/16″ | – 0.011″ / + 0.0″ | .307″ / .312″ .354″ / .359″ |
20,000 psi 15,000 psi |
| 3/4″ | – 0.010″ / +0.0″ | .432″ / .437″ .510″ / .515″ |
20,000 psi 15,000 psi |
| 1″ | – 0.010″ / +0.0″ | .557″ / .562″ .682″ / .687″ |
20,000 psi 15,000 psi |
Needle Valve Sizes and Pressure Ratings:
Description (See Fig. 1)
| Straight | Angle | 3-Way | 3-Way (Two Inlet) | Size | Pressure Rating* |
| DK20NV-04 | DK20NV-04-A | DK20NV-04-O | DK20NV-04-T | 1/4″ | 20,000 psi |
| DK20NV-06 | DK20NV-06-A | DK20NV-06-O | DK20NV-06-T | 3/8″ | 20,000 psi |
| DK20NV-09 | DK20NV-09-A | DK20NV-09-O | DK20NV-09-T | 9/16″ | 20,000 psi |
| DK20NV-12 | DK20NV-12-A | DK20NV-12-O | DK20NV-12-T | 3/4″ | 20,000 psi |
| DK20NV-16 | DK20NV-16-A | DK20NV-16-O | DK20NV-16-T | 1″ | 20,000 psi |
Fitting Sizes and Pressure Ratings:
Description
| Elbow | Tee | Cross | Female Union | Male Union | Size | Pressure Rating* |
| DK20L-04 | DK20T-04 | DK20X-04 | DK20FAU-04 | DK20MAU-04 | 1/4″ | 20,000 psi |
| DK20L-06 | DK20T-06 | DK20X-06 | DK20FAU-06 | DK20MAU-06 | 3/8″ | 20,000 psi |
| DK20L-09 | DK20T-09 | DK20X-09 | DK20FAU-09 | DK20MAU-09 | 9/16″ | 20,000 psi |
| DK20L-12 | DK20T-12 | DK20X-12 | DK20FAU-12 | DK20MAU-12 | 3/4″ | 20,000 psi |
| DK20L-16 | DK20T-16 | DK20X-16 | DK20FAU-16 | DK20MAU-16 | 1″ | 20,000 psi |
High Pressure
Tubing Sizes and Pressure Ratings:
| Nominal OD† | OD Tolerance | ID Range | Pressure Rating* |
| 1/4″ | – 0.007″ / + 0.0″ | .079″ / .083″ | 60,000 psi |
| 3/8″ | – 0.010″ / +0.0″ | .121″ / .125″ | 60,000 psi |
| 9/16″ | – 0.011″ / + 0.0″ | .182″ / .187″ .245″ / .250″ |
60,000 psi 40,000 psi |
| 3/4″ | – 0.010″ / +0.0″ | .245″ / .250″ | 60,000 psi |
| 1″ | – 0.010″ / +0.0″ | .432″ / .437″ | 30,000 psi |
Needle Valve Sizes and Pressure Ratings:
Description (See Fig. 1)
| Straight | Angle | 3-Way | 3-Way (two inlet) | Size | Pressure Rating* |
| DK30NV-04 | DK30NV-04-A | DK30NV-04-O | DK30NV-04-T | 1/4″ | 30,000 psi |
| DK60NV-04 | DK60NV-04-A D | DK60NV-04-O | DK60NV-04-T | 1/4″ | 60,000 psi |
| DK30NV-06 | DK30NV-06-A | DK30NV-06-O | DK30NV-06-T | 3/8″ | 30,000 psi |
| DK60NV-06 | DK60NV-06-A | DK60NV-06-O | DK60NV-06-T | 3/8″ | 60,000 psi |
| DK30NV-09 | DK30NV-09-A | DK30NV-09-O | DK30NV-09-T | 9/16″ | 30,000 psi |
| DK60NV-09 | DK60NV-09-A | DK60NV-09-O | DK60NV-09-T | 9/16″ | 60,000 psi |
| DK30NV-12 | DK30NV-12-A | DK30NV-12-O | DK30NV-12-T | 3/4″ | 30,000 psi |
Fitting Sizes and Pressure Ratings:
Description
| Elbow | Tee | Cross | Female Union | Male Union | Size | Pressure Rating* |
| DK30L-02 | DK30T-02 | DK30X-02 | DK30FAU-02 | DK30MAU-02 | 1/8″ | 30,000 psi |
| DK60L-04 | DK60T-04 | DK60X-04 | DK60FAU-04 | DK60MAU-04 | 1/4″ | 60,000 psi |
| DK60L-06 | DK60T-06 | DK60X-06 | DK60FAU-06 | DK60MAU-06 | 3/8″ | 60,000 psi |
| DK60L-09 | DK60T-09 | DK60X-09 | DK60FAU-09 | DK60MAU-09 | 9/16″ | 60,000 psi |
| DK30L-16 | DK30T-16 | DK30X-16 | DK30FAU-16 | DK30MAU-16 | 1″ | 30,000 psi |
Ultra High Pressure
Tubing Sizes and Pressure Ratings:
| Nominal OD† | OD Tolerance | ID | Pressure Rating* |
| 1/4″ | + 0.004″ / – 0.004″ | 3/32″ 1/16″ |
80,000 psi 114,000 psi |
| 3/8″ | + 0.004″ / – 0.004″ | 1/8″ 1/16 |
90,000 psi 150,000 psi |
| 9/16″ | + 0.004″ / – 0.004″ | 5/16″ 3/16″ |
60,000 psi 90,000 psi |
Needle Valve Sizes and Pressure Ratings:
Description (See Fig. 1)
| Straight | Angle | 3-Way | 3-Way (two inlets) | Size | Pressure Rating* |
| DK100NV-04 | DK100NV-04-A | DK100NV-04-O | DK100NV-04-T | 1/4″ | 100,000 psi |
| DK150NV-06 | DK150NV-06-A | DK150NV-06-O | DK150NV-06-T | 3/8″ | 150,000 psi |
Fitting Sizes and Pressure Ratings:
Description
| Elbow | Tee | Cross | Size | Pressure Rating* |
| DK100L-04 | DK100T-04 | DK100X-04 | 1/4″ | 100,000 psi |
| DK150L-06 | DK150T-06 | DK150X-06 | 3/8″ | 150,000 psi |
Applications:
Oil and Gas
Surface and Subsea
Hydraulic
Test Benches
Waterjet Cutting
Chemical Injections and Sampling
†Custom and Metric Sizes can be manufactured on request
*All pressure ratings are approximate and for illustration purposes only. Values are not guaranteed or warranted