Defects prone to occur in the welding zone of spiral submerged arc welded steel pipes include porosity, hot cracking, and undercut. 1. Bubbles. Bubbles often occur in the center of the weld bead. The main reason is that hydrogen gas remains hidden inside the weld metal in the form of bubbles. The

Oil casing can be broadly classified according to its application into: 1. Surface casing; 2. Intermediate casing; 3. Production casing; 4. Drilling casing. Surface casing primarily serves to suspend and support subsequent casing layers via a casing head installed at the top. It also isolates shallo

First, how to calculate the length of stainless steel pipe fittings. 1. 1.5 times the center height of the elbow = nominal diameter * 1.524. Essentially, it's nominal diameter * multiple. Round the result to the nearest integer. For example, a 219 elbow has a nominal diameter of 200, so the center

First, the production process of flanges The forging process generally consists of the following steps: selecting high-quality steel billets, heating, forming, and cooling after forging. Forging methods include free forging, die forging, and mold forging. During production, different forging method

① Heat treatment of seamless steel pipes: a. Heating: Heating below Ac1 mainly stabilizes the steel's microstructure and eliminates internal stress. Heating above Ac3 is mainly for austenitizing the steel. b. Holding: The purpose is to uniformize the heating temperature of the seamless steel pipe

The flange manufacturing process typically includes the following steps: Raw Material Preparation: Select appropriate materials (such as carbon steel, stainless steel, etc.) as raw materials. Inspect and confirm the quality of the raw materials to ensure they meet processing requirements. Cutt

TP347H stainless steel seamless pipe, also known as 347H stainless steel pipe, is a special steel widely used in high-temperature environments. Its unique material properties and wide range of applications make 347H stainless steel pipe play a crucial role in industrial manufacturing. TP347H Stainl

09CrCuSb straight seam steel pipe, as a type of steel resistant to sulfuric acid dew point corrosion, has significant application value in industries such as power, chemical, and metallurgy. The name of this steel originates from its chemical composition: 09 represents a carbon content ≤0.09%, with

Details of TP304 Stainless Steel Seamless Pipe 1. Chemical Composition of TP304 Stainless Steel Seamless Pipe: Carbon: ≤0.08%, Silicon: ≤1.0%, Manganese: ≤2.0%, Phosphorus: ≤0.040%, Sulfur: ≤0.030%, Nickel: 8.0~11.00%, Chromium: 18.00~20.00 2. Common Specifications of TP304 Stainless Steel Seamles

First, the concepts of galvanized steel pipes and stainless steel pipes are different. ● Galvanizing involves coating a layer of zinc onto the outer layer of a steel plate. This prevents corrosion and extends the lifespan of the galvanized steel pipe. Generally, steel pipes made of galvanized steel

Q690E straight seam welded steel pipe is a high-strength, low-alloy structural steel welded pipe widely used in engineering machinery, bridge construction, high-pressure vessels, mining equipment, and other fields. Its excellent mechanical and welding properties make it an indispensable material in

As a high-end pipe material in the oil and gas transportation sector, X80Q straight seam steel pipe has garnered significant industry attention in recent years due to its technical standards and market applications. This welded steel pipe, produced according to API 5L standards, demonstrates irrepla

Q550GJE straight seam welded steel pipe, as a high-strength, high-performance steel pipe product, plays an important role in modern industrial construction. This type of steel pipe, with its excellent mechanical properties, weldability, and weather resistance, is widely used in bridge engineering, b

S355MC straight seam steel pipe, as a high-strength low-alloy structural steel material, has wide applications in the industrial field. This steel pipe, with its excellent mechanical properties, good weldability, and formability, has become one of the preferred materials in construction, machinery m

Q345E cold-drawn seamless steel pipe is a high-quality steel widely used in the petroleum, chemical, power, boiler, and machinery manufacturing industries. As a low-alloy high-strength structural steel, its excellent mechanical properties and processing characteristics make it an indispensable key m

Q420E cold-drawn seamless steel pipe is a high-strength, low-alloy structural steel material. Due to its excellent mechanical properties and processing characteristics, it is widely used in construction, machinery, energy, and other fields. As a steel pipe processed with a special technique, Q420

First, Material Definition and Standard Origin of 25MnG High-Pressure Boiler Steel Tubes. SA-210C (25MnG) is a seamless carbon-manganese steel tube in the ASME SA-210 standard, specifically designed for boilers and superheaters, belonging to pearlitic heat-resistant steel. In 1995, my country adopt

First, Dimensional Characteristics of DN219 Steel Pipe DN219 steel pipe is a steel pipe with a diameter of 219 mm. In international standards, DN stands for "Specification of Steel Pipe Diameter," and 219 indicates a diameter of 219 mm. The diameter of a steel pipe is crucial for different