Changsha Xiangjia Metal Materical Co., Ltd.

DN, or "Nominal Diameter," refers to the nominal size of a pipe's internal diameter, represented in millimeters. This measurement is crucial for ensuring that pipes and fittings are compatible when connected, making it essential for both installation and operational efficiency. Common DN Sizes in Steel Tubes Steel tubes come in various DN sizes, each specifically designed for different purposes. Typically, the DN sizes range from DN15 to DN1200, with each size corresponding to a specific internal diameter. Below is a list of some of the most common DN sizes along with their respective nominal diameters in millimeters: - **DN15:** 21.3 mm - **DN20:** 26.7 mm - **DN25:** 33.4 mm - **DN32:** 42.2 mm - **DN40:** 48.3 mm - **DN50:** 60.3 mm - **DN65:** 73 mm - **DN80:** 88.9 mm - **DN100:** 114.3 mm DN, or nominal diameter, is a fundamental concept in the realm of steel tubes that signifies the nominal internal diameter of a pipe. With various DN sizes available, it is essenti...

  Seamless steel pipes are renowned for their exceptional durability and versatility, making them a vital component in numerous industrial applications. The selection of material for seamless steel pipes is essential and primarily falls into four categories: carbon steel, alloy steel, stainless steel, and specialty-purpose steel. The specific material choice must be determined based on the intended application, such as structural use, fluid transport, and boiler systems, as well as the performance requirements. Classification and Characteristics of Seamless Steel Pipe Materials 1. Carbon Steel: Carbon steel forms the backbone of seamless steel pipe materials and is commonly classified into grades such as 10#, 20#, 35#, and 45#. Among these, 20# steel is widely used for fluid transport pipelines, while 45# steel, known for its high hardness, finds application in mechanical structures. Performance Characteristics: - Low Carbon Steel (e.g., 10#, 20#): Exhibits excellent ductility and...

Oil casing pipes serve as a vital support system for the wellbore during the drilling process and post-completion operations. Their primary purpose is to maintain the integrity of the well walls, providing the necessary reinforcement to prevent collapses and maintain pressure balance. This ensures that the drilling process can proceed smoothly and that the oil well can operate effectively after completion. The proper use of oil casing pipes is integral to the success of oil drilling projects. Not only do they support the wellbore, but they also contribute to the safe and efficient retrieval of oil and gas. When a well is completed, these casing pipes act as a conduit for oil and gas to flow from the reservoir to the surface. Types of Specialized Oil Pipes The category of specialized pipes used in the oil and gas industry includes several types: oil drill pipes, oil casing pipes, and production tubing (commonly referred to as oil tubing).  1. Oil Drill Pipes: These pipes connect th...

Seamless steel pipes are essential raw materials widely used in construction, manufacturing, chemical engineering, petroleum, and other industries. They possess characteristics such as high strength, corrosion resistance, and high-temperature resistance, and can meet the usage requirements in various complex situations. This article will provide a detailed introduction to the application fields of seamless steel pipes. Seamless steel pipes can be divided into the following categories according to usage: Seamless steel pipes for structural use: Mainly used for the production of structural parts in buildings, bridges, vehicles, ships, etc. Seamless steel pipes for fluid transportation: Mainly used for the transportation of fluids such as petroleum, natural gas, water, and steam. Seamless steel pipes for high-pressure boilers: Mainly used for the production of high-temperature and high-pressure boilers. Seamless steel pipes for high-pressure gas cylinders: Mainly used for the production ...

In the realm of industrial applications, SSAW (Spiral Submerged Arc Welded) steel pipes are pivotal in various sectors, particularly in transporting gas and fluids. In this article, we will delve into the four primary corrosion protection systems utilized for SSAW steel pipes: the three-layer PE anti-corrosion system, fused epoxy powder (FBE), coal tar enamel, and polypropylene reinforced fiber tape. 1. Three-Layer PE Anti-Corrosion System The three-layer PE anti-corrosion system comprises an epoxy primer (≥80μm), an adhesive layer (170-250μm), and a polyethylene topcoat (2.5-3mm). This robust system offers exceptional impact resistance, achieving a strength of 10J/mm, making it suitable for various soil conditions. 2. Fused Epoxy Powder (FBE) Fused epoxy powder has a single-layer structure ranging between 300-500μm. Renowned for its superior compatibility with cathodic protection systems, FBE is applied through electrostatic spray at a pre-heated temperature of 230±5°C. Once cured, ...

In the world of manufacturing, hot-dip galvanized steel pipes have emerged as a critical component across various industries including construction, machinery, coal mining, chemical production, power generation, railway vehicles, automotive, road infrastructure, bridges, containers, sports facilities, agricultural machinery, oil machinery, exploration equipment, and greenhouse construction. This extensive range of applications underscores the importance and versatility of hot-dip galvanized steel pipes. What are Hot-Dip Galvanized Steel Pipes? Hot-dip galvanized steel pipes are welded steel pipes that are coated with a layer of zinc through a hot-dip galvanization process. This coating significantly enhances the steel pipe's resistance to corrosion, thereby extending its lifespan. The galvanization process involves immersing the steel pipes in molten zinc, ensuring a thick and durable protective layer that can withstand harsh environmental conditions. Advantages of Hot-Dip Galvan...