I.Performance and Purpose

It is made up of sealing ring ,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 designed to test steel pipe from its inner diameter,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 well.It is applicable to the pressure testing of casing,tubing,narural gas pipe and other steel pipe.

II.Design standards

According with several standards about hydraulic testing requirements：such as API 5CT/ISO11960:2011, GB/T9711.1-2011, GB/T9711.2-2011，etc. for Petroleum and natural gas industries—Steel pipes for casing or tubing; GB8163 - 2008 for seamless steel tubes; GB/T3092-2008 for welded steel pipes.

Working pressure: ≤ 60 MPa

Working temperature: -20℃～+80℃

Working medium: water, emulsion, hydraulic oil

III.Material: Polyurethane

IV.Design standards

Refer to GB/T3672.1-2002 tolerance.

V.Sample for ordering sign:

Marked the type,size and order No.of the sealing components,Order No.only is also permitted.

Example:ModelNM198 Order NoZN101

VI.Structure of device

Type NM of large gap ultrahigh-pressure sealing components