Changsha Xiangjia Metal Materical Co., Ltd.

The raw materials for   spiral steel pipes , such as steel coils, welding wire, and flux, undergo strict physicochemical tests and precise measurements of the length of the spiral steel pipes before being put into production. This is crucial for spiral steel pipe vendors. So, what are the applicable methods for measuring the length of spiral steel pipes? 1. Improved length measurement with encoder This method is an indirect measurement method that determines the length of the steel pipe by measuring the distance between the two ends of the pipe and their respective reference points. A length measurement trolley is placed at each end of the pipe, with the initial position set to zero and a distance of L. Then, the distance L2 and L3 traveled by the encoder to each end of the steel pipe is measured. The length of the pipe is calculated as L - L2 - L3. This method is easy to operate, with a measurement accuracy within ±10mm and a repeatability precision of ≤5mm. 2. Length measurement usin

Seamless pipes   are a type of pipeline material used for transporting fluids, gases, and solids. Due to their unique performance and advantages, they are widely used in various fields. Here are several application areas of seamless pipes: Petroleum and natural gas industry: Seamless pipes play a crucial role in petroleum and natural gas exploration, extraction, transportation, and processing. They are used as oil well pipes, oil pipelines, and gas pipelines, capable of withstanding high pressure and high temperature conditions, ensuring the safe and efficient transportation of fluids. Chemical industry: In the chemical industry, seamless pipes are used to transport various corrosive media such as acids, alkalis, salts, and chemicals. They have excellent corrosion resistance and high temperature performance meeting the demands of complex chemical processes. Power sector: Seamless pipes play a vital role in the fields of thermal power generation and nuclear energy. They are used to tra

Polyurethane insulated steel pipe  is suitable for conveying various things within the range of -50℃ to 150℃. It is widely used in centralized heating, cooling, hot oil transportation, as well as insulation and cooling projects in greenhouse, cold storage, coal mining, petrochemical, and other industries. After years of practical application, it has been widely recognized by users as an environmentally friendly and energy-saving insulation material and becoming the main stream for building insulation future. One of the reason why is polyurethane thermal insulation steel pipe becoming important is that it has good thermal insulation performance, and the heat loss is only 25% of the pipe material. Long-term operation can save a lot of energy. Polyurethane has strong waterproof and corrosion resistance. It does not need to be attached to the pipe trench and can be directly buried in the ground or water. The construction is simple and fast, and the overall cost is low. Moreover, it also h

Cold drawing precision tube   is elongating the metal without heating with cold drawing machine. The advantages are that it does not require high temperatures, but it may result in residual stresses. Also it is important to not elongate the tube excessively. Cold drawing can improve toughness and tensile strength, offering the better mechanical properties. The process for cold drawing (or cold rolling) of fine seamless steel tubes is as follows: round billet → heating → piercing → heading → annealing → acid pickling → oil coating (copper plating) → multiple cold drawing (cold rolling) passes → billet tube → heat treatment → straightening → hydrostatic testing (non-destructive testing) → marking → warehousing. The difference between cold drawing and cold rolling technology: Cold drawing refers to the method of applying tension at both ends of the metal material to make the material stretch and deform; Cold drawing refers to the method of applying a pulling force on one end of the materi

920 spiral steel pipes   are made of high-strength steel plates and have the characteristics of corrosion resistance, high temperature resistance, and high compressive strength. Its unique spiral structure allows it to maintain good stability and strength while withstanding external forces. Therefore, it has been widely used in construction projects. 920 spiral steel pipe is widely used in the construction field. 1. 920 spiral steel pipe is used for the main structure of high-rise buildings, such as steel frame structures, stairs, handrails, etc. Its high strength and stability enable buildings to bear greater loads and external forces, which improved their safety and durability. 2. 920 spiral steel pipe is also commonly used in the construction of industrial equipment and facilities, such as petrochemical plants, power plants, etc. Its corrosion resistance and high-temperature resistance allow it to operate stably for a long time in harsh working environments. 3. 920 spiral steel pipe