Quality Assurance

All valves and instrumentations from Industrial Valve Suppliers go through a quality control process to make certain they meet domestic and international standards.  Our emphasis on quality is the reason our customers come back to us and we guarantee that all of our new and surplus valves will have a trouble free operation in their process.

Every Valve Is Tested, Inspected and Tagged

The valve business has been regulated by a number of standards issued primary by national bodies, with a prevalence of American institutions (API, NACE, ANSI, and ASME).

Quality is only way to make customer satisfy. Industrial valve suppliers are committed for supplying quality products. We comply with all codes and standards applicable to the valves delivered by the Company. To achieve and maintain quality standards, the Company has established a comprehensive quality assurance team. This is backed by an audit encompassing design, manufacture, assembly, testing, examination, packing and shipping in accordance with the latest standards and specifications.

Facilities:

The Company’s laboratories are equipped for mechanical testing and metallurgical examination. In-house facilities are used for radiography, crack detection by magnetic particle, dye penetrate and ultrasonic examination. Hydrostatic testing detection ensures the integrity of assembled products and provides a final audit of their safety

Tests:

An industrial valve supplier is a certificated company, and the quality inspections, supervision of finished products are controlled under Quality guidelines issued by API. We have dual inspection system, each valves will be tested strictly according to the test standard before the dispatch to ensure the customer can get the high quality valves.

The test content includes raw material, castings, hydrostatic test, body thickness, strength of the material, appearance and sealing etc. The third party inspection certificates for non-destructive inspection and intergranular corrosion inspection will be provided.

THE INSPECTION

Following is the Sequence of Inspection Process followed by Industrial valve suppliers.

Inspection Process Flow

1. Castings & Forgings

  1. Source Inspection
  2. Review of Test Certificates
  3. Inward Inspection
  4. Chemical / Physical Tests Cross Check
  5. Shell Test
  6. NDT for New / Change in Pattern.

2. NDT
Tests Only on Samples and where specified

  1. D.P. Test on Machined Ends.
  2. Radiography of Castings.
  3. Ultrasonic Examination of Forgings / Bars.

3. Machined Parts

  1. Material Verification.
  2. On-Line Inspection
  3. Interchangeability.
  4. Final Inspection

4. Assembly

  1. Visual Inspection
  2. Performance Tests

5. Testing Ref. : API 598 / BS 6755 (1) / MSS.SP.61

  1. Shell Test
  2. Back Seat Test
  3. Seat Test
  4. Gland Leak Test
  5. Functional Check

6. Final Inspection

  1. Markings.
  2. Dimensional Check of End Connection.
  3. Quality Check of Assembly.
  4. Acceptance Mark.

Hydrostatic Test: Each and every Valve will undergo hydrostatic shell test prior to shipment. In accordance with MSS-SP-72 and ANSI B16.34, this testing includes an 80 psi air under water seat test and a hydrostatic shell test conducted at 1.5 times the cold working pressure (CWP) rating of the valve. Any visible leakage indicated by the above test procedures is cause for rejection.

Magnetic particle inspection: We use MPI to find cracks & discontinuities on the surface. Each test comes with a certified report. Magnetic particle inspection (MPI) is a non-destructive testing (NDT) process for detecting surface and slightly subsurface discontinuities in ferroelectric materials such as iron, nickel, cobalt, and other alloys.

Ultra sonic testing: We use UT to find flaws and discontinuities on the surface of a work piece. Each Test comes with a certified report. In ultrasonic testing (UT), very short ultrasonic pulse-waves with center frequencies are launched into materials to detect internal flaws or to characterize materials.

Our emphasis on quality is the reason our customers come back to us and we guarantee that all of our new and surplus valves will have a trouble free operation in their process





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