T91/P91 Steel Pipe For Exchanger

T91/P91 steel pipes are widely used in superheaters and reheaters of subcritical and supercritical boilers, as well as high-temperature headers and steam pipes with lower wall temperatures.

standard:ASTM

Surface :1. Galvanized 2. Black and Color Painting

introduction

What is the difference between T91 steel pipe and P91 alloy steel pipe?
T91 alloy boiler tube belongs to ASTM A213 and is used for ferritic and austenitic boiler superheater and heat exchanger seamless steel tubes. But for ASTM A335 P91 superheater tubes, they are targeting ferritic and alloy seamless steel tubes for high temperature service.

T91/P91 steel pipes can be used as steel pipes for high-temperature superheaters and reheaters in subcritical and supercritical boilers with wall temperatures ≤625°C, as well as high-temperature headers and steam pipes with wall temperatures ≤600°C. They can also be used as nuclear power heat exchangers and petroleum cracking. Steel for installing furnace tubes.
T91/P91 seamless steel pipe not only has high oxidation resistance and high temperature steam corrosion resistance, but also has good impact toughness and high and stable long-lasting plasticity and thermal strength properties. When the service temperature is lower than 620°C, its allowable stress is higher than that of austenitic stainless steel. Above 550°C, the recommended design allowable stress is approximately twice that of T9 and 2.25Cr-1Mo steel.

Technical Data

P91/ T91 pipe Equivalent Material

ASTM	DIN	JIS	GB
P91/ T91	X10CrMoVNNb91	STBA 26	10Cr9Mo1VNbN

P91/ T91 alloy Pipe Chemical Composition

Grades	C	Mn	P,≤	S,≤	Si	Cr	Mo	W
P91	0.07-0.13	0.3-0.6	0.02	0.01	0.2-0.5	8.0-9.5	0.85-1.05	/

P91/ T91 seamless alloy pipe Mechanical Properties

Material

Yield strength

ReH/Rp0,2 N/mm² min

Tensile strength

Rm N/mm²

Elongation A

% min

P91/T91

415

585

company advantage

gnee invested 200 million yuan to transform advanced equipment and production lines, including the implementation of ISO9001-2000 quality management system and ISO14001 environmental protection system. At the same time, it actively developed diversification and formed a production system based on carbon steel and stainless steel pipes as its main products, covering Pipes, profiles, plates.

FAQ

1.Q.How do we trust your company?
A. We specialist in steel business for many years, authenticated by SGS,welcome to visit our factory.

2.Q.Can your products be customized?
A.Yes, we can produce and process according to your requirements.

3.Q.Do you have quality control?
A.Yes, we have got BV.SGS certification.