A Steel Pipe Fitting Inspection and Test Plan (ITP) is a document that outlines the quality control measures and procedures to be followed during the manufacturing, testing, and inspection of steel pipe fittings, The inspection procedure for steel pipe fittings typically involves the following steps according to ITP:

1 Visual Inspection: The first step in the inspection process is a visual inspection of the steel pipe fittings. The inspector will check for any visible defects, such as cracks, corrosion, or surface imperfections.

2 Dimensional Inspection: The inspector will then check the dimensions of the steel pipe fittings to ensure they meet the required specifications. This may include measuring the diameter, length, and wall thickness of the fittings.

3 Material Verification: The inspector will verify the material used in the production of the steel pipe fittings. This may involve checking the material certificates to ensure that the correct type and grade of material has been used. also PMI is used of check the chemical of the raw material, after that, there will be mechnical inspection involved.

Destructive Testing

Destructive Testings are performed to check the strength of the body and weld of the product.

  • The proof test is also known as a Type Test or burst test.
  • Tensile test
  • Impact test / Charpy V-Notch Test
  • Hardness test

4 Non-Destructive Testing (NDT): The inspector may perform non-destructive testing (NDT) on the steel pipe fittings to detect any internal defects that may not be visible during the visual inspection. This may include ultrasonic testing, radiographic testing, or magnetic particle testing.

Non-Destructive testing

Based on the type of fittings, any of the following Non-Destructive testings are performed on finished fittings to ensure the soundness of the product.

  • Ultrasonic
  • Radiography (Only for Weld)
  • Magnetic particle test
  • Liquid penetrant test
  • And Positive Material Identification

5 Hydrostatic Testing: The steel pipe fittings may undergo hydrostatic testing to ensure they can withstand the required pressure. During this test, the fittings are filled with water and pressurized to a level higher than their maximum operating pressure.

Hydrotest for Pipe Fittings
  • Hydrostatic Test Not required for pipe fittings unless specifically requested by the purchaser.
  • Code mandates that fittings be able to withstand the pressure required by the applicable Piping Code.
  • Most purchasers mandate that a hydro-tested pipe shall be used to manufacture fittings.

6 Final Inspection: After all other inspections and tests have been completed, a final inspection is performed to ensure that the steel pipe fittings meet all of the required specifications and standards.

The specific inspection procedures may vary depending on the type of steel pipe fitting and the applicable standards and regulations.