321 SS Tubing

321 SS Tubing

321 SS tubing 321 Stainless steel Seamless tubing (gb3087-1999) is used in the manufacture of various structures of low medium pressure boiler superheated steam tubing, boiling water tubing and locomotive boilers with superheated steam tubings, opium tubings, small smoke tubings and arch bricks...
Product description

321 Stainless Steel Tubing

321 Stainless steel Seamless tubing (gb3087-1999) is used in the manufacture of various structures of low medium pressure boiler superheated steam tubing, boiling water tubing and locomotive boilers with superheated steam tubings, opium tubings, small smoke tubings and arch bricks for the use of high-quality carbon structural steel hot-rolled and cold (rolling) seamless steel tubing.

321 Stainless Steel tubing: It is mainly used for high quality carbon structural steel, alloy structural steel and stainless steel tubing for steam boiler piping, such as high-pressure and above pressure, the boiler tubing is under high temperature and high pressure, and the tubing can oxidize and corrode under the action of High-temperature flue gas and water vapor. Therefore, the steel tubing has a high durability, high oxidation resistance, and a good organization stability, hydraulic prop tubing.


321 Stainless Steel Tubing with Steel Number

High-quality carbon structural steel number has 20G, 20MnG, 25MnG; 304 stainless steel tubing.

Alloy Structural Steel No. 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12cr2mog, 12CrMoVG, 12CR3MOVSITIB, etc. rust-resistant steel is commonly used 1cr18ni9, 1CR18NI11NB High-pressure boiler tubing In addition to ensuring chemical composition and mechanical properties, the root to do water pressure test, to be expanded, flattening test.


321 Stainless steel tubing is delivered in heat treatment condition. In addition, the microstructure, grain size and decarbonization layer of the finished steel tubing are also required. Geological drilling and oil drilling and control seamless steel tubing, in order to detect underground rock structure, groundwater, oil, natural gas and mineral resources, the use of drilling rig wells.

Oil, natural gas mining more inseparable from drilling, geological drilling and control of oil drilling seamless steel tubing is the main equipment, mainly including core outer tubing, core inner tubing, casing, drill tubing and so on. Because drilling tubing to depth to thousands of meters depth of the formation of the work, 1cr5mo alloy tubing.


The working conditions are extremely complex and the drill tubing is subjected to pull, pressure, bending, torsional and unbalanced impact load, such as stress, also be subjected to mud and rock wear, therefore, the requirements of the tubing must have sufficient strength, hardness, wear resistance and impact toughness, steel tubing with "DZ" (geological of the Chinese Phonetic Alphabet) plus number one represents the steel yield point, The commonly used steel number has DZ45 45MnB, 50Mn, DZ50 40mn2, 40mn2si DZ55 40mn2mo, 40MnVB, DZ60 40MnMoB, DZ65 27MnMoVB. The steel tubing is delivered in heat treatment condition.


Petroleum Cracking Tubings

Seamless tubings for use in furnace tubings, heat exchanger tubings and tubinglines for petroleum refineries. Commonly used high quality carbon steel (10, 20), Alloy Steel (12CrMo, 15CrMo), heat-resisting steel (12cr2mo, 15cr5mo), Stainless (1cr18ni9, 1Cr18Ni9Ti) manufacturing. In addition to the chemical composition of the steel tubing and a variety of mechanical properties, but also to ensure water pressure, flattening, expansion and other tests, and surface quality and nondestructive testing. The steel tubing is delivered under heat treatment condition.


Stainless Steel Tubing

With a variety of stainless steel hot-rolled, cold-rolled stainless steel tubing, widely used in petroleum, chemical equipment tubinglines and various uses of stainless steel structural parts, in addition to ensure that chemical composition and mechanical properties, where used to withstand fluid pressure of the steel tubing to ensure that water pressure test qualified. All kinds of special steel tubing should be guaranteed under the conditions.


Welded Steel Tubing

Also known as welded tubing, is a steel tubing or steel strip through the bending molding, and then welding made. According to the weld form is divided into straight seam welded tubing and spiral welded tubing.


It is divided into general welded tubing, galvanized welded tubing, oxygen-blowing welded tubing, wire casing, metric welded tubing, roller tubing, deep well tubing, 321 stainless steel tubing, automobile tubing, transformer tubing, welded thin-walled tubing, welding-shaped tubing and spiral welded tubing.


Alloy Steel Tubing

321 Stainless steel tubing is a hollow section with no seams around the long steel. The steel tubing has a hollow section and is used as a conduit for conveying fluids, such as tubinglines for oil, gas, gas, water and some solid materials. Seamless tubing is divided into hot-rolled tubing, cold-rolled tubing, cold-drawn tubing, extruded tubing, tubing 16Mn seamless tubing.

1. Fluid Transport seamless Steel tubing ($literal) is used for conveying water, oil, gas and other fluids of the general seamless steel tubing.

2. And low-medium-pressure boilers with seamless steel tubings (cr5mo alloy tubing) is used in the manufacture of various structures of low medium pressure boiler superheated steam tubings, boiling water tubings and locomotive boilers with superheated steam tubings, opium tubings, small smoke tubings and arch bricks for the use of high-quality carbon structural steel hot-rolled and 321 stainless steel


Chemical Composition

C ≤ 0.08  

Si ≤ 1.00  

Mn ≤ 2.00  

S ≤ 0.030  

P ≤ 0.035  

Cr: 17.00~19.00  

Ni: 9.00~12.00  

Ti ≥ 5×C%

 

Mechanical Properties

Tensile Strength σb (MPa) ≥ 520

Conditional Yield Strength σ0.2 (MPa) ≥205

Elongation Rate δ5 (%) ≥40

Section Shrinkage ψ (%) ≥50

Hardness ≤ 187HB; ≤ 90HRB; ≤200HV


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