Changsha Xiangjia Metal Materical Co., Ltd.

 Formulas for calculating  LSAW steel pipe  theoretical weight 1. The theoretical weight should be calculated as follows: M=0.0246615(D-T)T In the formula:  M-steel pipe unit length weight Kg/M accurate to two decimal places, such as 0.01Kg D——Nominal outer diameter of steel pipe mm T——Nominal wall thickness of steel pipe mm 2. Steel pipes within the scope of this standard shall be delivered according to the theoretical weight, and also can use the actual weight according to by agreement. Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pipe in 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.

After the production of  SSAW steel pipe , the cross-section should be round. The standard of ovality is that the large outer diameter must not be 1% larger than the nominal outer diameter, and the small outer diameter must not be 1% smaller than the nominal outer diameter. When the port of the SSAW steel pipe appears elliptical, it cannot be connected during butt welding in the construction. So what kind of SSAW steel pipe easy to ellipse? When the end of SSAW steel pipe have welded seam that needs fixed, it is prone to ellipse. Another reason is that the SSAW steel pipe of the butt joint plate is prone to ellipse. When pipe ends with repair welding or a large number of repair welding areas and butt joints on the pipe, the ovality of the spiral welded pipe must be measured carefully, and if it exceeds the standard then need to repair. ​ How to deal with the elliptical defect of the SSAW steel pipe? Usually, we use lifting jack. After measuring the small diameter, use the jack to push

 The use of  seamless steel pipes  almost covering the entire engineering field. In many cases, seamless steel pipes are installed when they are purchased. The quality of installation effect its use directly. So how to install seamless steel pipes correct to gets better results? Let's take a look at the relevant steps: 1. Thin-walled seamless steel pipes should not be contact with cement, cement mortar and concrete. When the pipeline is concealed, anticorrosive tape should be wrapped around the outer wall of the pipe or should use thin-walled seamless steel pipe covered with plastic. 2. When cement mortar is used to fill the buried pipeline, insulation materials should be used to ensure that there is a gap between the cement mortar and the pipe. In order to make the pipe stretch freely. 3. Plastic-coated thin-walled seamless steel pipe (Type 316) should be used for buried ground to avoid acid-base corrosion on the outer wall of the pipe or damage to the pipe by sharp and hard debri

 The slag in the welded steel pipe is the residual slag in the welded junctions. Theoretically speaking, the main reasons for slag in welded junctions are: for the raw materials (base metal, welding wire, flux), the finishing between layers during multi-layer welding is not clean and the welding process parameters Inappropriate. According to the production characteristics of  LSAW steel pipes , it is possible to eliminate the slag inclusion in the welded junctions due to the irregular arrangement of layers during multilayer welding. In view of the problem of slag inclusion in the welded junctions due to inclusions in the raw materials, checking material before welding, replacement of new welding wire and flux, etc., the slag inclusion in the welded junctions reduced. So it is not the main reason for slag inclusions. Therefore, the main reason for slag inclusion in the welded junctions of thick-walled LSAW steel pipe is improper welding process parameters. The welding process parameters