Mill Seamless Elbow Alloy Steel Elbow A335 P91 Butt Weld 45 90 180 Degree Pipe Lr Sr Elbow

• Introduction

Alloy pipes and fittings have excellent corrosion resistance and high strength, and are widely used in industries such as petroleum, chemical, power, and shipbuilding etc. The characteristics of alloy steel elbows mainly include the following aspects:

• Firstly, alloy steel pipe fittings have good pressure resistance and can withstand working conditions in high-pressure environments, ensuring the safe operation of the pipeline system.
• Secondly, alloy steel pipe fittings have excellent corrosion resistance, which can resist the erosion of acidic and alkaline media, prolong service life, and reduce maintenance costs.

In addition, alloy steel pipe fittings have the characteristics of good dimensional stability and easy installation, which can meet the needs of different occasions and improve the efficiency of engineering construction.

• Manufacturing process and working principle of alloy steel pipe fittings

The manufacturing process of alloy steel pipe fittings usually includes processes such as material preparation, forging or cold stamping, and heat treatment. The working principle is to change the direction of the pipeline to achieve fluid steering and maintain the normal operation of the pipeline system.

• A335 P91

A335 P91 not only has high oxidation resistance and high-temperature steam corrosion resistance, but also has good impact toughness, high and stable durability and thermal strength performance. When the operating temperature is below 620 ℃, its allowable stress is higher than that of austenitic stainless steel. At temperatures above 550 ℃, the recommended design allowable stress is about twice that of T9 and 2.25Cr-1Mo steel.

It can be used as steel pipes for high-temperature superheaters and reheaters with wall temperatures ≤ 625 ℃ in subcritical and supercritical boilers, as well as high-temperature headers and steam pipelines with wall temperatures ≤ 600 ℃. It can also be used as nuclear electric heat exchangers and furnace tubes in petroleum cracking units.
Elongation rate: ≥ 20 (%)
Chemical composition of P91 steel wt%
C 0.08~0.12 Mn 0.30~0.60 Si 0.20~0.50 P ≤ 0.02 S ≤ 0.01 Cr 8.0~9.5 Mo 0.85~1.05 V 0.18~0.25 Nb 0.06~0.1 N 0.03~0.07 Al ≤ 0.04 Ni ≤ 0.4

• Alloy steel—Pipe fittings

• Application

Our company can produce carbon steel, stainless steel, and alloy steel pipe fittings according to standards such as ASME/ANSI, JIS, DIN, ISO etc. The varieties include equal diameter tees, reducing tees, tees, elbows, cross, concentric reducer, eccentric reducer etc. We provide the very best quality pipe and fittings, prompt delivery and reliable services at competitive prices.