Double submerged arc welded pipe (DSAW) derives its name from the welding process wherein the welding arc is submerged in flux while the welding takes place. Both inside and outside welds are required and are usually accomplished in separate processes. These separate welds consume a portion of the other resulting in a single high quality weld nugget.

Galvanized steel can be made into a strong pipe or plumbing material, which is a material capable of resisting corrosion from water or the outside environment.

A106 and A153 are steel pipes that are widely used in industry. The appearance of the two pipes is similar. However, there are some differences in specs and quality.

API Coupling refers to the steel couplings that used in connecting casing pipe and tubing. Also known by OCTG coupling, it is usually manufactured in seamless type, material grade same with the pipe body (API 5CT K55/J55, N80, L80, P110 etc), same PSL or providing higher grades than requested. Same heat treatment also applicable, except there is an special requirements.

API 5CT is standard technical specifications for steel casing and tubing pipes used for oil wells in petroleum and natural gas industries. Besides casing and tubing, it also includes pup joints, coupling stock, coupling material, and accessory materials, and establishes requirements for three product specification levels (PSL-1, PSL-2, and PSL-3). The requirements for PSL-1 are the basis of this standard.

Boiler steel pipes includes medium pressure boiler pipe and high pressure boiler pipe, it is often manufactured in seamless procedures, welded steel pipe is not applicable. It has been widely used at heat exchanger pipe and tubing services, tube exchanger bundle, high pressure boiler, economizer, super heater, petrochemical industry pipes, etc.

As we know steel pipe and steel plate mechanical performances depends on two aspects: One is the heat treatment type; Another one also the most important factor is the chemical elements effect to these steel material.

When talking about precision pipe, always means for small diameters seamless pipe or stainless pipe, how is that?And what is differences between precision steel pipe and normal steel pipe? So today we are going to explain what is precision pipe from below aspects: Material Standards Manufacturing Processes Size Tolerances Features Applications

ASTM A335 pipe (with Grade P9, P11, P22, P91 pipes) has been widely used in different industries for high temperature, high pressure services. According to market data, it is one of the most consumption alloy pipes in boiler industry, heat exchanger, power station, high and super high pressure vessels.

Seamless pipes are widely used in nuclear devices, natural gas, petrochemical, shipbuilding and boiler industries. Seamless pipe occupies 65% of the market share of China's boiler industry.

This specification covers electrical-fusion-welded steel pipe for high-pressure service at moderate temperatures. Heat treatment may or may not be required to attain the desired properties or to comply with applicable code requirements.

SCM420 alloy steel pipe harden ability is higher, no temper brittleness, weld ability is quite good, form the cold cracking tendency is small, can be good mability and cold plastic strain.