Hydrostatic testing of spiral welded steel pipes is the most direct and practical testing method for their actual use. The inspection standards explicitly require that each spiral welded steel pipe undergo a hydrostatic pressure test, primarily to verify that there is no damage or leakage at the seam or along the pipe body under the specified pressure, thereby ensuring that the spiral welded steel pipes meet the required standards.
The anti-corrosion treated spiral welded pipe also needs to undergo strict anti-corrosion coating inspection to ensure the protective layer is uniform, without damage or bare spots, allowing customers to be assured of the coating quality of anti-corrosion spiral welded steel pipes.
X-ray inspection is a method specifically designed for non-destructive testing of welds in spiral welded pipes. Defects in the welds, which are typically invisible to the naked eye, can be detected using X-ray non-destructive testing equipment. The principle behind X-ray inspection involves X-rays penetrating the weld to create an image of it. By analyzing this image, issues such as incomplete fusion or missed welds can be identified, ensuring that the weld quality of Cangluo Group’s SSAW pipes meets the required standards.
When might we need to demagnetize SSAW pipes? Here are some common scenarios:
✅ Welding Process: Residual magnetism can cause uneven welds or arc deflection, affecting weld quality.
✅ Installation and commissioning: Magnetic pipes may attract iron filings or other contaminants, making cleanup more difficult.
✅ Measurement accuracy: Certain instruments are highly sensitive to magnetic fields, and magnetic pipes can affect measurement results.
By using a pipe demagnetizer, these issues can be easily resolved, ensuring the smooth progress of your project!
The primary purpose of hardness testing for spiral welded pipes is to measure the pipe’s hardness in order to assess its compressive strength and wear resistance. Qualified spiral welded pipes should possess a certain level of hardness to meet the requirements of various operating environments.
Using a universal testing machine, a slowly increasing axial tensile force is applied to a tube specimen prepared according to specifications until the specimen breaks. During this process, the testing machine continuously records data on changes in load and displacement, thereby plotting a stress-strain curve. By analyzing this curve, we can accurately determine the following key performance parameters of the metal pipe material: 1. Yield strength: The stress value at which the material begins to undergo significant plastic deformation. 2. Tensile strength: The maximum stress the material can withstand before fracture.
Magnetic particle inspection utilizes magnetic fields and the physical properties of magnetic particles to detect surface and near-surface cracks in steel and welds. The magnetic field causes the magnetic particles to form a pattern at the location of a defect, thereby revealing the defect’s position and shape. Magnetic particle inspection can be divided into two types: wet and dry methods. Inspection of steel and welds is a non-destructive testing method used to identify potential defects and cracks in steel and welds.
Direct-reading spectrometer testing of spiral welded steel pipes is a critical test for determining the chemical composition of the pipes. By testing samples, the proportions of iron, carbon, silicon, sulfur, phosphorus, and other chemical elements in the pipes can be determined, providing customers with essential material compliance data.
The primary function of a metallographic specimen pre-grinding machine is to mechanically polish specimens using metallographic sandpaper of various grits, thereby removing plastic deformation and surface heat marks caused during specimen cutting, and preparing specimens for subsequent metallographic microscopic analysis.
Impact testing is a traditional destructive testing method for spiral welded pipes and serves as a key means of evaluating the ability of welded structural materials to resist brittle fracture under dynamic impact loads. Cangluo Group’s spiral welded pipes can undergo impact testing under various conditions, including low-temperature and ambient-temperature environments, ensuring that SSAW pipes meet impact resistance standards.
