ASTM A106 SMLS Steel Pipe
A Brief Introduction to the Material of ASTM A106 SMLS Steel Pipe
ASTM A106 SMLS steel pipe is a kind of high quality steel pipe widely used in petroleum, chemical and boiler industries. The material has good mechanical properties. A106B US standard seamless pipe implements ASTM A106/A106M high temperature operation carbon steel seamless steel pipe standard, grade B. From the pipeline standard of ASME B31.3 chemical plant and petroleum refinery, it can be seen that the material temperature range of ASTM A106 SMLS steel pip is - 28.9 - 565 C.
Mechanical properties: tensile strength Rm (> 415MPa), yield strength ReL (> 240MPa), elongation (> 12%)
ASTM A106 SMLS steel pipe has good welding performance. Owing to the low C content, the welded joints usually do not have severe hardening structure. The plasticity and toughness of the welded joints are good. The whole welding process can obtain satisfactory welded joints without special technological measures.
Role of ASTM A106 SMLS steel pipe groove
The function of groove is mainly to weld workpiece, to ensure weldability and welding quality. Normally, the surface machined by machine can be cut by gas when the requirement is not high, but the oxide slag needs to be removed. According to the need for K-type groove, V-type groove, etc., but most of the requirements to retain a certain blunt edge.
Before ASTM A106 SMLS steel pipe groove welding construction, groove is formed at the end of welded steel bar. The groove surface should be smooth, and there should be no cracks, blunt edges or missing edges at the edge of the incision. The groove angle should be 55-65 degrees when the groove is welded flat. When vertical groove welding, the groove angle should be 40-55 degrees. Among them, the taste of lower steel bar is 0-10 degrees, and that of upper steel bar is 35-45 degrees.
Processing method of ASTM A106 SMLS steel pipe groove
The main function of American standard steel pipe groove is to ensure welding quality. The method of groove is based on practical application.
1. Gas cutting groove, before welding, the oxide skin on the surface should be removed. The processing cost is low and the working efficiency is fast. It is suitable for the processing of US standard steel pipes over 8mm.
2. Machine lathe processing, the processing surface quality is good, the price is high, the work efficiency is slow, can process thin-walled U.S. standard steel pipe groove.
