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JST 3" External S seal passed PR2 test, as well as 13” S seal. JST S seal use material HNBR85+316SS, BV witnessed HNBR S seal at working condition -29°C to +121°C, 10000PSi, product design refer to API 6A -annex F. The material HNBR(H3385) meet API immersion test, RGD test. The Inspector also applied following activities: 1: Reviewed the test certificate of raw material HNBR ( H3385), the Re...
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