The Use of Alloy Steel Pipe Is Divided into The Following Categories

Alloy pipe is a kind of precision precision seamless steel pipe, its performance is much higher than that of ordinary precision precision seamless steel pipe, because this kind of steel pipe contains more Cr, its high temperature resistance, low temperature resistance, corrosion resistance. The performance is unmatched by other precision precision seamless steel pipes, so alloy pipes are widely used in petroleum, aerospace, chemical, electric power, boiler, military and other industries.

Classification of use     Deviation level     Standardized outer diameter tolerance

D1                                           ±1.5%                        Minimum ±0.75 mm

D2                                           ±1.0%                       Min ±0.50 mm

D3                                           ±0.75%                    Minimum ±0.30 mm

D4                                           ±0.50%                    Minimum ±0.10 mm

Alloy tubes are mainly used for heating surface pipes of low and medium pressure boilers (working pressure is generally not greater than 5.88Mpa, and working temperature is below 450℃); for high-pressure boilers (working pressure is generally above 9.8Mpa, working temperature is 450℃～650℃) ℃) heating surface pipes, economizers, superheaters, reheaters, pipes for petrochemical industry, etc.

High pressure alloy tube grades: 15CrMoG, 12Cr2MoG, 12Cr1MoVG, 12Cr2MoWVTiB, 10Cr9Mo1VNb, SA210A1, SA210C, SA213 T11, SA213 T12, SA213 T22, SA213 T23, SA213 T91, SA213 T92, ST45.8/Ⅲ, 15CrMo4.10, etc.