Understanding and Applications of Different Seamless Steel Pipes

Understanding Seamless Steel Pipe

Seamless steel pipe is made by punching a complete round steel, with no welded seams on the outside. According to its production method, it can be divided into hot-rolled, cold-rolled, cold-drawn, extruded, etc. The cross-sectional shape can be divided into round and non-round. It is often seen in industries such as petroleum, chemical, automotive, and aviation. The interior of the seamless steel pipe is hollow and has a corresponding cross-sectional area. There are no seams on all four sides, and the common shapes are square, round, etc. It can be used to transport liquids and has better compressive strength and lighter weight than traditional solid steel, making it a cost-effective steel tube widely used in manufacturing, industry, vehicles and other fields.

Uses of Different Seamless Steel Pipe

  • Ordinary seamless steel pipe: Ordinary seamless steel pipes are rolled from ordinary carbon steel, high-quality carbon steel, low-alloy steel, or alloy structural steel. It has a variety of specifications and high strength, and is the most commonly used pipe material for pipes with a working pressure of 1.6MPa or less. It is widely used in various chemical pipelines, such as thermal pipelines, refrigerant pipelines, compressed air pipelines, oxygen pipelines, acetylene pipelines, and various chemical pipelines except for highly corrosive media.

  • Stainless steel seamless steel pipe: Stainless steel seamless steel pipe is made of chromium-nickel stainless steel and has two types: hot-rolled and cold-rolled tubes. It has the characteristics of acid resistance and strong corrosion resistance, but is expensive. It is mainly used for chemical pipelines with special requirements.

  • Welded steel pipe for low-pressure fluid transportation: Welded steel pipe for low-pressure fluid transportation is a seamed pipe. Generally, Q215-A, Q235-A, and Q255-A ordinary carbon steel are used. According to surface quality, welded spiral steel pipe can be divided into galvanized (white iron pipe) and stainless steel (black iron pipe). According to whether the pipe end is threaded, it can be divided into threaded and non-threaded. According to the wall thickness of the pipe, there are ordinary and thick types.

Ordinary steel pipe wholesale can generally withstand a water pressure test of 2.0MPa, and thickened pipes can withstand a water pressure test of 3.0MPaz. Ordinary steel pipes and thickened pipes can generally be used for pipelines with low-medium temperature working pressure media. For example, indoor heating pipelines, steam pipelines, hot water pipelines with a working pressure not exceeding 1.0MPa and a nominal diameter not exceeding 100mm can be used; those with a nominal diameter not exceeding 65mm are used for compressed air pipelines with a working pressure not exceeding 0.8MPa; Those with a nominal diameter not exceeding 50mm can be used for gas or natural gas and clear water pipelines. Contact us for more information about seamless steel pipe for sale.

In hot water above 60℃, the zinc in galvanized steel pipe will reverse polarity when the temperature is between 60-120℃. In fact, hot galvanized steel pipe does not prevent the corrosion of the steel, but promotes the corrosion of the steel, causing the water pipes to rust quickly and eventually puncture.

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