Thin-walled stainless pipe
Thin-walled stainless pipes made of austenitic steel possess strength, long operational life, resistance to effect of chemical agents. Except for corrosion resistance, they are biologically inert, non-magnetic and have attractive look. Nickel gives plasticity without loss of strength. Titanium yet more increases its strength. Alloying with molybdenum increases acid resistance, corrosion and wear resistance at a high temperature. Such pipe can be welded by any type of welding: manual, gas-electric, automatic arc-electric welding. Welding is performed without heating and finishing heat processing by forming consistent reliable seam.
Percentage composition 10x17n13m2t (GOST 5632−72)
|≤ 0,1||≤ 0,8||≤ 0,3||≤ 2||≤ 0,035||16−18||≤ 0,7||≤ 0,02||2−3||Basis|
The main demerit is its high self-cost. But taking into account their reliability and long operational life, such price is more than warranted.
According to standards of GOST 28 548−90, seamless pipe must be manufactured by method of rolling, forging, drawing or pressing without welding seams over a length as long as even the most qualitative seam cannot prevent leaking. X10CrNiMoTi18−12 (AISI 316 Ti) is applied most often. Its analog is X6CrNiMoTi17−12−2. By correlation of wall thickness and outer diameter, all steel pipes are divided into thick-walled and thin-walled.
|Name||Correlation of thickness and outer diameter|
|Stainless thin-walled pipe||0.025 — 0.05|
|Stainless super-thin-walled pipe||less than 0.025|
Correlation 0.05 means that wall thickness is 1/20 of diameter.
At correlation of 0.025, wall thickness is 1/40 of diameter.
Thin-walled stainless tube is intended for long operational use in aggressive environment: in petrochemical industry, chemical industry, shipbuilding. Working temperature must not exceed +300°С. They are mostly used for transportation of toxic liquids where any leaking is unacceptable. Super-thin-walled and thin-walled pipes are used in lightweight and rugged construction. They are requested in manufacture of fittings for furniture trade, where is required a perfect and smooth surface without any roughness. They are also much-needed in medicine and pharmacology.
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