... tree, Gate valve, pipeline fittings, flange, and wellhead assembly. BETTER can supply a full size of ring joint gaskets, flexible ... , etc. All our gaskets are manufactured according to API 6A, and ISO 9001:2000, which is interchangeable with those standard ... IX850, IX900, IX950, IX1000, IX1050, IX1100, IX1150, IX1200. Certificate: API 6A, ISO9001: 2000 Pressure: PN2.0(CLASS150)-PN42.0(CLASS2500 ...