P-Type plain washer end-face sealing

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Performance and Purpose

This end-face sealing ring is mainly used in the hydraulic testing of large diameter seamless pipes and a variety of welded steel pipes. When testing, pay attention to maintain the balance of oil and water pressure, and keep a uniform speed and strength during pressing. When releasing water pressure, it is important to have a good follow-up of oil pressure to prevent the sealing ring being damaged by a sudden change of the pressure on the sealing end-face caused by the insertion of the steel pipe.



  1. The sealing material has the advantage of high strength, high hardness and good elasticity
  2. The sealing structureis more simple than the other sealing rings.

Working conditions:

Compliant for use with several standards about hydraulic testing requirements including API 5CT-2018, ISO11960-2011 Petroleum and natural gas industries—Steel pipes for casing or tubing, GB/T9711.1-2011, GB/T9711.2-2011; GB8163-2008 for seamless steel tubes; GB/T3092-2008 for welded steel pipes.

Working pressure:  ≤ 30 MPa

Working temperature:  0℃~+80℃ 

Working medium:  water, emulsion, hydraulic oil

Material:  Polyurethane