LSAW (Longitudinally Submerged Arc Welded Steel pipes) in leaflets plate as raw material, the steel plate in the mold or molding machine pressure (volume) into using double-sided submerged arc welding and flaring from production.
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As a superior technology center has been establish ed including the domestic first-class chenical laboratory,mechanics laboratory, the metallography test laboratory and welding laboratory with advanced equipments for inspection and test Accordingly,it can provide a comprehensive inspection for the raw material and the finished products so that it guaran test the high quality of products.
1. The tensile test is to test the metal’s tensile strength, yield strength, elongation and reduction of cross sectional area in order to assess the strength and plasticity of welding seam or welded joint.
2. The bend tests include horizontal bend test, axial bend test, face bend test, root bend test and side bend test which are mainly used to test the plasticity of welded joint.
3. The impact test is used to test the toughness and notch sensibility of weld metal and welded joint.
4. The hardness test can be used to test the Rockwell hardness, Brinell hardness and Vickers-hardness of welded joint, as well as test the hardening tendency of welded joint. It can also be used to indirectly test the embrittlement degree of welded joint.
5. The fatigue test is used to test the fatigue strength of weld metal and welded joint as well as the fatigue crack growth rate of welded joint.
specification, Standard and identificationWelded steel pipe (steel pipe manufactured with a weld) is a tubular product made out of flat plates, known as skelp, that are formed, bent and prepared for welding.
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