Classification of boiler tubes: seamless steel tubes are divided into hot rolled and cold rolled seamless steel tubes.
Hot – rolled seamless steel tubes are divided into general steel tubes, low and medium pressure boiler steel tubes, high pressure boiler steel tubes, alloy steel tubes, stainless steel tubes, petroleum cracking tubes, geological steel tubes and other steel tubes.
Cold-rolled (plucked) seamless steel tube in addition to the general steel tube, low and medium pressure boiler steel tube, high pressure boiler steel tube, alloy steel tube, stainless steel tube, oil cracking tube, other steel tube, but also including carbon thin-walled steel tube, alloy thin-walled steel tube, stainless steel tube, stainless steel tube, non-rust thin-walled steel tube, special-shaped steel tube.The outer diameter of hot-rolled seamless tube is generally greater than 32mm, the wall thickness is 2.5-75mm, the diameter of cold-rolled seamless tube can be up to 6mm, the wall thickness can be up to 0.25mm, the outer diameter of thin-walled tube can be up to 5mm, the wall thickness is less than 0.25mm, the dimension precision of cold-rolled than hot-rolled is high.
Seamless steel tube is generally used: 10, 20, 30, 35, 45 and other high quality carbon steel 16Mn, 5MnV and other low alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other alloy steel hot or cold rolling made.Seamless tubes made of low carbon steel, such as 10 and 20, are mainly used in fluid transport pipelines.Seamless tubes made of medium carbon steel, such as 45 and 40Cr, are used to make mechanical parts, such as stressed parts of cars and tractors.Generally seamless steel tube to ensure the strength and flattening test.Hot rolled steel tubes are delivered in hot rolled or heat treated condition;Cold rolling is delivered in heat treatment condition.
STANDARD:
DIN 17175 GB3087 GB5310 SA192 SA179etc
APPLICATION:
For manufacturing heating-pipelines.containers.
steaming pipelines of low or medlum pressure boilers
{p≤450,work pressure≤5.88Mpa)
SPECIFICATION
SRE Range:
From 19mm on to 610mm
Thickness:From 2mm to 65mm WT
