Type NM of internal expanding sealing components Performance and Purpose it is made up of sealing ting, fan-shaped supporting blocks and fan-shaped angles, it is mainly used in the pressure test of steel pipe by hydrostatic testing machine. As it is deigned to test steel pipe from its inner dameter. when testing, the sealing ring will expand to enclose the pipe inner diameter to achieve the purpose of sealing, its test head is smaller than type D or c and production cost is lower as wen. it is applicable to the pressure testing of casing, tubing, natural gos pipe and other steel pipe. Working conditions According with API 50-2018. IS011960-20M. GB/T9711-2017 etc. Such as petroleum ond natural gas industries-Steel pipes tor use as cosing or tubing for we*s: GB/I8163-2018 secm'ess steel tubes: GB/I309I 2015 welded steel pipes, and other standard hydraulic testing conditions. Working pressure: < 60 MPo workvig temperature: -201: ~ *80,C Working medium: water, emulsion, hydraulic ol Material: Polyurethane Design standards: Refer to G6/T3672. i -2002 tolerance Sample for ordering sign: worked 'he type. s;ze ana order No. of the sealing components. Order No. only is also permitted, type Order No. Example: NM189 ZNI88