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Nutech Testing Standards

1. Hydraulic test Facility

Hydro-pneumatic Testing Up to 50,000 PSI or as per your Requirement.

2. Pneumatic Test Facility

  • Booster pump (intensifier): To test pneumatic pressure of valves up to 10,000 PSI or as per your requirement.
  • Pneumatic testing Machine: To test any valve up to 2250 PSI or as per your requirement.
  • Air Compressor : To test any fitting or valve pneumatically up to 10 kg pressure or as per your requirement.

Valves will be subjected to 1.5 times of working pressure. Leaking will be tested by keeping the valves both in open and closed condition. The pressure will be released and valve will be closed by bare hand without applying excess torque through hand tools, Hydraulic pressure shall be applied from one end there will be no seat leakage observed for a minimum period of 10 minutes. API 598, “Valve Inspection and Test”

The most widely used test specification in the world today. The document covers all types of valves in sizes through NPS 24. It also includes leakage rates and testing criteria for metal-seated and resilient-seated valves.

API 527, “Seat Tightness of Pressure Relief Valves”

This document covers the seat tightness of pressure relief valves. It also includes allowable leakage rates for testing with steam, water and air.

ASME B16.34, “Valves – Flanged, Threaded and Welding End”

The primary valve design document, it also contains charts for determining the working pressures of valves to be used in conjunction with other test standards, such as API 598. B16.34 contains a test procedure, but no seat leakage acceptance criteria.

FCI 70-2, “Control Valve Seat Leakage”

This document contains detailed test procedures and leakage rate classes for control valves. The leakage classes are also occasionally referenced by other documents and used as acceptance criteria.

ISA-S75, “Hydrostatic Testing of Control Valves”

It provides a procedure for the hydrostatic shell testing of control valves. Closure testing and acceptance criteria are out of the scope of this document and usually are covered by referencing FCI 70-2.