Changsha Xiangjia Metal Materical Co., Ltd.

SY/T5037-2018 departmental standard and GB/T9711-2017 national standard are two common standards for   spiral pipes . The prices of the two standards spiral pipes is differ greatly. Even if the material and specifications are the same, the national standard spiral pipes are priced 300-400 RMB higher per ton compared to the departmental standard. Why? Follpw us to analyze it. Firstly, the production process of national and departmental standard spiral pipes is the same. The difference is in the inspection during the production process. The national standard requires 100% ultrasonic testing for each pipe, while the departmental standard only requires sampling inspection of 20%. Additionally, in X-ray industrial TV inspection, the national standard is also stricter than the departmental standard. Secondly, in terms of hydraulic testing, the national standard spiral pipes have a minimum specified percentage of yield strength for static hydraulic pressure testing, which is at least 75% an

Alloy seamless pipe   contains a higher amount of Cr element, which gives it better high temperature, low temperature, and corrosion resistance properties compared to ordinary seamless pipe. Therefore, alloy seamless pipe is widely used in industries such as petroleum, chemical, and power. T91 alloy seamless pipe is a new type of martensitic heat-resistant steel and belongs to a type of steel pipe. Compared to 12Cr1MoV steel, the carbon content of T91 steel is reduced by 20%. This decision was made after comprehensive consideration and analysis as carbon element is the most significant element for solid strengthening effect in steel. P91 alloy seamless pipe is an alloy pipe produced through perforation and rolling. P91 alloy pipe for fluid transportation is rolled from ordinary carbon structural steel, low alloy structural steel, or alloy structural steel. In addition, P91 alloy steel has its own unique uses such as boiler P91 alloy pipe, geological P91 alloy pipe, and petroleum seamle

According to national standards, the galvanized layer thickness of   galvanized pipes   has strict requirements. Let’s take a look together! The thickness of the galvanized layer of galvanized pipes is based on the environment and requirements of its use. According to national standards, the galvanized layer thickness of galvanized pipes should meet the following criteria: 1. For workpieces with a thickness ≥ 6 millimeters, the average galvanized layer thickness should be greater than 85 micrometers. 2. For workpieces with a thickness less than 6 millimeters but greater than 3 millimeters, the average galvanized layer thickness should be greater than 70 micrometers. 3. For workpieces with a thickness less than 3 millimeters but greater than 1.5 millimeters, the average galvanized layer thickness should be greater than 55 micrometers. 4. For workpieces with a thickness less than 1.5 millimeters, the local galvanized layer thickness should be greater than 45 micrometers. It is noted that