Tube for liquid service

 Tube for liquid service can transport conveying oil, gas, and other fluids to connect tanks and machines in a system.

Standard

• GB/T 8163: for fluid transportation (GB/T8163-2018)
• ASTM A53M: Black and Hot-dipped Zinc-coated Steel Pipes Seamless
• ASTM A106M: Seamless Carbon Steel for High Temperature Service
• ASTM A333M: Seamless Carbon and Alloy Steel for Mechanical Tubing
• JIS G3454: High pressure and high temperature service
• JIS G3455: Carbon steel pipes for high pressure service at an approximate maximum temperature of 350℃.
• JIS G3456: carbon steel high-pressure pipes are widely used for high pressure service, pressure service and high temperature software.

Compared to solid steel such as steel pipes and round steel in flexural torsional strength the same, lighter, is an economic section steel, widely used in the manufacture of structural parts and mechanical parts, such as drill pipe, automotive transmission, bike frame and steel used in construction scaffolding.

Tube for liquid service is designed for conveying the tubes having the fluid properties of the medium. Having the nature of the fluid medium, in addition to the liquid medium such as water, oil, solution, etc., cement, grain, coal and other solid media, under certain conditions, can also be mobile.

Fluid tubes made of steel, copper, titanium and other non-ferrous metals manufacturing, and even can be manufactured from plastic and other non-metallic materials. Must be fluid tube having a hollow cross-section, but can also be square, triangular or any other shape, and some of the equipment subject to conditions, it must be used a rectangular tube, but most or using round tube. Tube in all geometric cross-section having a minimum perimeter / area ratio of the maximum internal cross-section, i.e. under conditions using the same amount of materials can be obtained.

Steel pipe due to its low cost, high strength, in the modern society, the fluid delivery to be widely applied. Steel pipe into seamless steel pipe and welded pipe two categories according to their production process, which welded pipe is divided into ERW (ERW), spiral welded pipe (SSAW), submerged arc welded pipe (UOE). In the past, the fluid tubes to the traditional use of seamless steel pipe, materials science, the molding process, the development and progress of the crew and equipment, welded pipe has been a great development.

Welded pipe has the advantages of better than seamless pipe wall thickness uniformity, high precision, low energy consumption, high production efficiency, demanding oil and gas pipeline (API standard), almost one hundred percent use of seamless pipe, today in the United States, Japan, Europe and the developed countries, more than 95% have been welded pipe replaced.

With ordinary steel pipe, the welded pipe for transporting fluid tubes have different requirements:

• the weld is not allowed to leak. Requirements for API like welded pipe, also requires ultrasonic inspection and hydrostatic test of each welded pipe welds;
• for conveying a corrosive chemical solution, all pipe must be carried out to the inner wall of anti-corrosion treatment;
• fluid tubes need to remove the inner burr in order to reduce the resistance to fluid transport.