Home » Boiler & Heat Exchanger Steel Tubes » EN10216-2 Steam Boiler Tubes for Pressure Vessels basic information, the classification as well as the reference standard

Seamless steel tubes for low and medium pressure boiler (GB3087-2008) is used in the manufacture of various structure of low and medium pressure boiler superheated steam pipe, superheated steam pipe, boiling water pipe and locomotive boiler flue tube, small pipe and brick arch tubes of high-quality carbon structural steel hot-rolled and cold drawn seamless pipe (rolling). GB3087-2008 “for low and medium pressure boiler seamless steel tube” provisions. The structure of boiler tubes of various specifications, outer diameter of 10 ~ 426mm, a total of 43. The wall thickness is 1.5 to 26mm a total of 29. GB3087-2008 “for low and medium pressure boiler seamless steel tube” and “GB5310-2008″ seamless steel tube for high pressure boiler regulations. Appearance quality: both inside and outside the pipe surface does not allow cracks, folding, rolling reduction, scarring, separation and hairline. These defects should be completely removed. Clears the depth shall not exceed the negative deviation of the nominal wall thickness, the minimum clearing the actual wall thickness shall be not less than the thickness of the wall of the allowed values.

EN10216-2 Steam Boiler Tubes for Pressure Vessels

According to incomplete statistics, China’s existing seamless tube production enterprises is about more than 240, seamless steel pipe units of about 250 sets, EN10216-2 Steam Boiler Tubes for Pressure Vessels capacity of about about 4500000 tons. From the aperture, < Phi 76, accounting for 35%, < phi 159-650, accounted for 25%. Look from breed, general purpose pipe 1900000 tons, accounting for 54%; the oil pipe 760000 tons, accounting for 5.7%; hydraulic prop, precision tube 150000 tons, accounting for 4.3%; stainless steel tube, bearing tube, automobile pipe a total of 50000 tons, accounting for 1.4%.

The billet is fed into the furnace heating, the temperature is about 1200 DEG c.. Fuel into hydrogen or acetylene. The furnace temperature control is the key problem. Round tube blank released after pressure punch through the air. Generally more common puncher tapered roller machine, this machine has high production efficiency, good product quality, perforation diameter enlargement, can wear a variety of steel. After perforation, round tube has been three roll cross rolling, rolling or extrusion. Extrusion to take off pipe diameter. Sizing machine through the high-speed rotation of the cone drill into steel embryo punching, forming steel. Pipe diameter by sizing machine drill diameter length to be determined. Steel pipe sizing, enters the cooling tower, water cooling pipe through, after cooling, will be straightening. Pipe by straightening sent by conveyor metal detection machines (or hydrostatic test) internal inspection. Steel pipe internal cracks, bubbles and other issues, will be detected. Steel pipe quality inspection also through strict hand selected. Steel pipe quality inspection, use spray paint on the number, size, production batch number etc.. And by crane into the warehouse.

Classification:

Cold and hot points mainly consists of seamless steel tube boiler pipe (DIAL) seamless steel pipe two categories.

Hot rolled seamless steel tube is divided into general steel, low, medium pressure boiler steel pipes, high pressure boiler steel pipe, alloy pipe, stainless steel pipe, oil cracking tube, pipe and other pipe and other geological.

Cold rolling seamless steel pipe (DIAL) in addition to points of general steel, low and medium pressure boiler steel pipes, high pressure boiler steel pipe, alloy pipe, stainless steel pipe, oil cracking tube, the other steel tube, also including carbon thin wall steel pipe, alloy thin-wall steel pipe, stainless steel pipe, thin-walled shaped steel tube. Diameter seamless steel tube mill is generally greater than 32mm, wall thickness 2.5-75mm, cold-rolled seamless steel pipe diameter can be 6mm, wall thickness up to 0.25mm, thin-walled tube outer diameter to 5mm, wall thickness is less than 0.25mm, cold than ASTM A179 Seamless Heat Exchanger Steel Tubes.

Used in the manufacture of a variety of low and medium pressure boiler, superheated steam tube, boiling water pipe, superheated steam pipe, water wall tube and locomotive boiler flue tube, tube and pipe arch bricks. With high-quality carbon structural steel hot-rolled or cold-rolled seamless steel pipe (dial). The main 10, No. 20 steel manufacturing, in addition to ensure that the chemical composition and mechanical properties of the outer do pressure test, curling, flaring, flattening test. Hot rolled hot-rolled state of delivery, Leng Zha (DIAL) to heat treatment delivery.

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