S Seals is made from elastomer and two metal garter spring.

The metal garter spring is incorporated into the elastomeric seal element.

The one-piece S seal eliminates the installation issues that may occur when using multi-component seals. It can be stretched into place without splitting or damaging the non-extrusion components. S seal can be manufactured to accommodate almost any gland size, including large diameter or cross-section.

JST has conducted the test to qualify the PR2 performance of 3 inch ESS at PX (-29℃/-20℉～177℃/350℉) temperature rating, 10000psi nitrogen high pressure.

1 Test conditions

1) Product PN：  ESS0762V90G03

2) Material：   V7090+SS316

3) Temperature：  -29℃~177℃

4) Pressure：  10000psi

5) Gas Test Medium：     N2

6) Sealing Type： Static seal

2 Product

3 Fixture and Assembly

4 Test procedure

5 Acceptance standards

1.Hydrostatic Test at Ambient Temperature

The hydrostatic test at a temperature between 4 °C and 50 °C (between 40 °F and 120 °F) shall be identified as passed if no visible leakage occurs during the specified pressure hold periods of the test. The pressure change observed on the pressure-measuring device during the hold period shall be less than 5 % of the test pressure or 3.45 MPa (500 psi), whichever is less.

2.Gas Test at Ambient Temperature

The gas test at a temperature between 4 °C and 50 °C (between 40 °F and 120 °F) shall be acceptable if no sustained bubbles are observed. If leakage is observed, the rate shall be less than the rates 11cm³/h, measured at atmospheric pressure, during specified pressure-hold periods.

3.Minimum/Maximum Temperature Tests

The hydrostatic or gas test at high or low temperature shall be acceptable if the pressure change observed on the pressure-measuring device is less than 5 % of the test pressure or 3.45 MPa (500 psi), whichever is less.

4.Pressure Stabilization

Pressure shall be considered stabilized when the rate of change is no more than 5 % of the test pressure per hour or 3.45 MPa (500 psi), whichever is less. Pressure shall remain within 5 % of the test pressure or within 3.45 MPa (500 psi), whichever is less, during the hold period.

5.Temperature Stabilization

Temperature shall be considered stabilized when the rate of change is less than 0.5 °C/min (1 °F/min). The temperature shall remain at or beyond the extreme during the hold period but should not go beyond the upper and lower temperatures by more than 11 °C (20 °F).

6 Test conclusion

3 Inch ESS External S Seal PR2 Test Data

※Note: When applying pressure to port B , port A is blocked with a plug.

7 Conclusion：

3" External FKM S-seal product number ESS0762V90G03 passed API 6A 21st Edition Annex F PR2F per section F.2.14:Design Validation PR2F for Group 5 Mandrel-type hanger at temperature P-X(-20 deg F - 350 deg F) and working pressure of 10,000 psi with gas as test medium.