A355 P91 Seamless Steel Pipe Outer Diameter 20" Wall Thickness Sch-5s

SEAMLESS Steel Pipe A355 P91 Outer Diameter 20" Wall Thickness Sch-5s

What is a Seamless Pipe?

Stainless steel pipe is a kind of hollow long round steel, which is widely used in industrial transmission pipelines and mechanical structural components such as petroleum, chemical industry, medical treatment, food, light industry, machinery and instruments, etc. In addition, when the bending and torsional strength are the same, the weight is light, so it is also widely used in the manufacture of mechanical parts and engineering structures. It is also commonly used as furniture, kitchenware, etc.a

mless pipes are derived from solid steel that is in s

Mode of production

Stainless steel pipe can be divided into seamless pipe and welded pipe according to the production mode. Seamless steel pipe can be divided into hot-rolled pipe, cold-rolled pipe, cold drawn pipe and extruded pipe. Cold drawing and cold rolling are the secondary processing of steel pipe; Welded pipe is divided into straight seam welded pipe and spiral welded pipe

Nconel625 is a brand of alloy with a density of 8.4 g / cm3 and a melting point of 1290-1350 ℃. It has excellent corrosion resistance to inorganic acids and various corrosive media in oxidation and reduction environment.

Alloy 625 shows excellent corrosion resistance in many media. It has excellent resistance to pitting corrosion, crevice corrosion, intergranular corrosion and corrosion in chloride medium.

A335 P91, steel model. It has high oxidation resistance and high temperature steam corrosion resistance

characteristic:

It not only has high oxidation resistance and high temperature steam corrosion resistance, but also has good impact toughness, high and stable durable plasticity and thermal strength. When the service temperature is lower than 620 ℃, the allowable stress is higher than that of austenitic stainless steel. Above 550 ℃, the recommended design allowable stress is about twice that of T9 and 2.25Cr-1Mo steel.

application

It can be used as steel pipe for high-temperature superheater and reheater of subcritical and supercritical boilers with wall temperature ≤ 625 ℃, as well as high-temperature header and steam pipe with wall temperature ≤ 600 ℃, as well as nuclear electric heat exchanger and furnace pipe of petroleum cracking unit.

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