Changsha Xiangjia Metal Materical Co., Ltd.

The   spiral pipe   size inspection are: the wall thickness, outer diameter, length, curvature, ovality, end face groove and obtuse angle of the spiral pipe, and the cross-sectional shape of the special-shaped steel pipe. 1. The commonly used inspection tool for steel pipe wall thickness is the wall thickness micrometer. During inspection, use a qualified micrometer to measure the wall thickness of the steel pipe one by one. The end side measurement of the spiral pipe should be no less than 8 points. The modern seamless steel pipe production unit uses ultrasonic equipment to detect and record the full length of the steel pipe wall thickness. 2. The tools used for the inspection of the outer diameter and ovality of the steel pipe are calipers and vernier calipers. When measuring, the caliper or vernier caliper should be perpendicular to the axis of the steel pipe, and the steel pipe should be slowly rotated to measure the maximum and minimum points of the section where the steel pipe is

Flange   used to connect and install   spiral steel pipe . The installation should be constructed in strict accordance with the process specifications. Here   Xiangjiasteel   will talk about the problems that need to be pay attention to when use flange to connect and install spiral steel pipe: 1. Before installing, check the sealing surface and gasket to avoid affecting the sealing performance. 2. When connecting, the flanges should be kept parallel and the deviation should not bigger than 1.5/1000 of the outer diameter of the flange, and should be less than 2mm. Do not use strong bolts to eliminate skew. 3. The plane of the flange should be perpendicular to the axis of the spiral steel pipe. The fillet welds on the inner side of the flat-welded flange should not be missed and and remember to remove the impurities such as oxides after welding. 4. The gasket should be a full circle, the inner diameter should be 2-3mm bigger than the inner diameter of the flange. 5. The flanges should be

Generally,  Q345 welded pipe  has no magnetism or weak magnetism, so that for manufacturers, it is necessary to eliminate the magnetism of Q345 welded pipe. How to solve the magnetic problem of Q345 welded pipe? In order to completely eliminate the magnetism of the Q345 welded pipe, the austenite can be stabilized by high temperature solid solution to eliminated magnetism. Changsha Xiangjia Metal Materical Co., Ltd.  is professional manufacture in SSAW steel pipe, galvanized steel pipe, seamless pipe etc. with various grades and sizes. Years of production experience and manufacturing facilities who have a capacity of 200,000 tons per annual will ensure the good quality and competitive duration of our products.

Recently, China Oil and Gas Pipeline Engineering Technology Research Center Co., Ltd. successfully completed the first full-scale expansion test of high-grade steel   spiral welded pipes   in China. Three spiral welded pipes of φ1219×22mm and X80 steel grade were used in the experiment. According to different expansion rates, grouped batch expansion tests were carried out on the whole pipe length. After more than half year of preparatory work, from the preliminary investigation to the formulation of the experimental plan, the experiment has been successfully completed. This test fills the gap in the research on the expansion of the whole body of the large-diameter and high-grade steel spiral welded pipe in China, and has achieved the expected results. Changsha Xiangjia Metal Materical Co., Ltd.  is professional manufacture in steel pipe, we are focus on the news related to steel and steel pipes, and likely to report them on our site.