Screwed pipe fittings heat treatment should be in accordance

　　Screwed pipe fittings heat treatment should be in accordance with the provisions of the corresponding material system, and heat treatment process records, heat treatment needed for metallographic analysis and hardness testing. Mechanical properties after heat treatment and other requirements, should be consistent with the provisions of the corresponding material standards.The inner and outer surfaces of Screwed pipe fittings shall be smooth and shall not have defects such as scratches, cracks, pull marks, heavy skin, sticky sand and splash.

　　150LB class thread 304 screwed pipe fitting have five conventional methods of flaw detection are ray detection method, ultrasonic flaw detection method, magnetic particle testing method, eddy current flaw detection method and penetration testing method. Pipe will not attack corrosion, pitting, corrosion or wear. Generally do not have any resistance to corrosion.