What to Know About Quality Control Inspection for Pipe Products

| Updated on October 28, 2023


Pipes are tubes often used in conveying water, gas, oil, or other fluid substances from one point to another. They are essential for the various operations that involve the movement of substances like liquid or gas that require high-purity applications, process control, and proper fluid delivery within the systems. Pipes are vital components for dependable fabrication. Any weak or failure-prone pipe must be quickly detected and removed before being introduced to the work site.

Pipe quality inspection is essential for regulatory compliance, the economy, and safety. Several factors must be considered during the quality control inspection process, including the dimensions, hardness, and edge condition. Other aspects of this vital process include the power delivered to the welding unit, and the condition of tooling surfaces, bearings, and other components.

Quality Control Inspection for Pipe Products

There are different types of pipes with their functions depending on the types of materials they are made from under two categories: metallic and non-metallic. The different types require various evaluations of quality control to ensure standard requirements are met. Some of the inspections conducted on pipe products include:

Visual Inspection

Visual Inspection is a non-destructive test that involves examining the physical qualities of the pipe for any visible defects such as cracks, corrosion, dents, or other deformities. The inspection can be conducted physically or using a video system. It is usually one of the first steps in the process to guarantee pipe quality. The surface is carefully inspected so any obvious defects can be identified and corrected before more advanced tests are conducted.

Bend Testing

This is a quality control inspection test used to examine the flexibility of the material of a pipe. Conducting this test provides information about how it can be used without breaking during bending. A pipe intended for use in curved places must be ductile enough to retain its shape without getting deformed. It is bent into a specified shape and radius to measure its ability to adapt to various applications and repair activities. Failure to carry out this test can mean a product that does not meet required industry standards.

Dimensional Inspection

Dimensional inspection is an evaluation of the physical dimensions of the products for quality control and conformity to specified industry requirements. Other aspects of the pipes must be examined to ensure they adhere to the required standards. This information is needed to ensure optimum performance during use. Instruments such as laser devices and micrometers are used to measure the length, roundness, diameter, and wall thickness of the pipes. 

Hydrostatic Testing

Hydrostatic Testing is a pressure evaluation method used to evaluate the integrity of valves and other pressure-containing products. In this inspection process, the pipe is filled with water and the pressure is increased to a specified level for a specified duration to simulate the operating conditions. The test is designed to identify any leaks or weaknesses in the pipe wall. Pressure is monitored during the test to ensure that it does not exceed the specified limits. Hydrostatic testing is also conducted to assess the condition of existing pipes.

Magnetic Particle Inspection

Magnetic Particle Inspection (MPI) is a non-destructive testing method used to detect surface and slightly subsurface discontinuities in ferromagnetic materials, such as iron and steel. The process involves applying a magnetic field to the surface of the pipe and then using a magnetic particle solution to highlight any cracks or other defects. The MPI is often conducted to detect surface and near-surface cracks, laps, seams, and other discontinuities that may affect the pipe’s performance and safety.

Impact Testing

Impact testing is a quality control test used to evaluate the toughness and resistance of a material to external forces. It involves striking the pipe with a pendulum or a falling weight and measuring the amount of energy it can absorb before it breaks. Impact testing is used to assess the material’s ability to withstand shock from sudden, high-stress loads. It is an important quality control inspection to verify that the pipe meets required industry standards for use in maintenance and repair activities.

Hardness Testing

Hardness testing is conducted during production to determine the hardness of the material. It is an important process used by inspectors to guarantee pipe quality and ensure that it meets required industry standards.

The various hardness testing methods used include the Rockwell, Vickers, Knoop, and Brinell hardness tests. The specific process used tends to vary with the type of pipe and the industry standards it must meet. The test results provide valuable information, such as its strength, wear resistance, and ability to withstand plastic deformation. 

Chemical Analysis

Chemical Analysis is an important quality control inspection test in the manufacture of pipes. It is conducted for more detailed information about the chemical structure and composition of the material. In pipe quality inspection, the test is used to verify that the required standards are met, including suitability for prolonged use.

A variety of techniques are employed when it comes to performing this chemical analysis, including X-ray fluorescence and emission spectroscopy. Once they are conducted, the results contain the necessary information about the pipe’s chemical properties, resistance to corrosion, and suitability for use in specific applications. This process is also performed as part of routine maintenance and inspection programs to monitor the long-term performance of pipes in service.


Quality control inspection is a vital aspect of pipe manufacturing. Early detection of problems can help your business save more while reducing disruptions in operation. All the tests we provide in this article are conducted to ensure pipe products meet a specified standard. Whether regulatory compliance or per your requirements, they are necessary processes to guarantee pipe quality.

These tests usually include several methods to ensure the product is safe, strong, and durable. The point is EC Global Inspection is ready to help your business with quality control inspection and other relevant services in your production process. We are a perfect option to ensure your pipe products maintain consistent product quality and are suitable for their intended use. Contact us today to find out more.



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