Stainless steel pipe added with Ni and Cr chemical elements to provide better corrossion resistance for to use in different environment, common use material 304/L and 316/L, standard in ASTM A312, A213, A270 and etc.
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Stainless steel pipe is a kind of hollow and longitude steel, economic steel section is round shape. Stainless steel pipe and tube has been widely used in oil, chemical industry, medical, food, light industry, equipment and apparatus and structural parts etc. In additional, when twisting and anti-twist intensity is equal, stainless steel is more lighter, so it used in equipment parts and projects structural. Also used to produce all kinds of conventional weapons, barrel, shells and so on. This kind of pipes divide into: stainless steel seamless pipes and stainless welded pipes. According by manufacturing process can divided into following basic types: hot-rolled, extrusion, cold-circular, hexagonal, equilateral triangle, octagonal and other special-shaped stainless steel pipe
Octal offers super austenitic stainless steel pipe and tube in different material standards and grades.
ASTM A312
ASTM A213
ASTM A269
ASTM A789/ASME SA789
ASTM A790/ASME SA790
ASME SB677
The ASTM A312 standard specification for seamless, welded, and heavy cold worked austenitic stainless steel pipes. stainless steel pipe and tube is widely in sulfuric acid storage tank in the phosphate fertilizer industries. Fluorosilicic /acid reactor phosphoric acid plant; Chlorate Crystallizer in the production of fertilizer; Ventilation system in pharmaceutical factory; Solvent recovery filter, condenser, pipeline; Bleaching equipment and filter in the pulp and paper industry; pipelines and water collecting system in offshore platforms; multi-stage flash distillation, low-temperature multi effect desalination; seawater condenser for power plant and so on.
Where:
t = Nominal Wall Thickness
D = Ordered Outside Diameter
The ASTM A213 covers the seamless ferric carbon steel and austenitic alloy stainless steel tube, applied for boiler, superheater, and heat-exchanger steel tubes.
The ASTM A269 covers the stainless steel tubes for common application in seamless and welded.
ASME SB677 specification covers the UNS N (904L), UNS N, UNS N (alloy 926), in seamless, of cold-drawn, and hot finished steel pipe and steel tube for the extremely corrosive services. The standard includes the material in carbon steel, and ferritic alloy steel, and austenitic stainless steel pipes and tube, 6% molybdenum alloy stainless seamless pipe and tube.
ASTM A789/ ASME SA789 covers seamless and welded ferritic/austenitic stainless steel tubing for general services. The standard also applied to duplex stainless steel tube material. All tubes in this standard shall be furnished with heat-treated condition according to specified temperature and quench conditions. When the final heat treatment is in a continuous furnace, or when heat treated condition is obitained directly by quenching after hot forming, the number of tubes of same size and from the same heat lot shall be determined from the prescribed sizes of the tubes.
ASTM A790/ ASME SA790 is standard specification for seamless and welded ferritic/austenitic stainless steel pipe. Including duplex stainless steel pipe material. The standard specification mainly covers seamless and longitudinal weld ferritic/austenitic steel pipe, that applied intended for general corrosive services, with particular emphasis on resistance to stress corrosion cracking. This kind of pipe shall be manufactured by seamless or automatic welding process, without adding filler metal in the welding processes. Heat analysis shall be made to determine the percentages of the chemical elements specified. Tensile test, hardening test, flattening test, hydrostatic tests and nondestructive test shall be performed to the specified requirements.
Octal supply range for the stainless steel pipe and tube:
Standards: ASTM A321, ASTM A213, ASTM A269, ASME SB677
Duplex stainless steel pipe standards: ASTM A789/ ASME SA 789. ASTM A790/ ASME SA 790
Material: AISI 304, 304L, 316, 316L
Outer Diameter: 5.8 &#; 508mm,
Wall Thickness: 0.3 &#; 50mm
1. Seamless Hot Rolling Processes
Round Pipe Billet &#; Heating &#; Perforation &#; Three Roll Skew Rolling, Continuous Rolling or Extrusion &#; Off Pipe &#; Sizing (Or Reducing Diameter)&#; Cooling &#; Billet &#; Straightening &#; Water Pressure Test ( Or Flaw Detection) &#; Marking &#; Storage
2. Seamless Cold Rolling (Cold drawn) Processes
Round Pipe Billet &#; Heating &#; Perforation &#; Head &#; Annealing &#; Pickling &#; Oil (Copper) &#; Multi Pass Drawing (Cold Rolling) &#; Billet &#; Heat Treatment &#; Straightening &#; Water Pressure Test &#; Marking &#; Storage
3. Longitudinal welding (Straight seam welding) processes
Including ERW, EFW.
Corrosion resistance performances is the key feature for stainless tube. The commonly used types of steel involve ferritic and martensitic steel, that are predominantly made by adding chromium and manufactured through heat-treatment or to be annealed. There are austenitic stainless steel tubing products that are rich in chromium and nickel and they offer better resistance levels when used under the same conditions as compared to martensitic or ferritic materials.
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As Stainless steel tubing applied in different industries and applications, so what are the common types of the Stainless tubing pipe. Here are below:
&#; Stainless steel tubing in high pressure use
&#; Sanitary tubing
&#; Mechanical use
&#; Stainless steel tubing for structural and construction
&#; Boiler stainless steel tube, heat exchanger
&#; Aircraft tubing
&#; Oil and gas industries, Petroleum cracking process, Casing and tubing
&#; For pipelines, liquid transmission
Generally manufactured using solid chromium or a combination of nickel and chromium, including manufactured in seamless and welded stainless pipe. Such as electric fusion welded pipe (ERW) that find application in high-pressure usage; Large diameter stainless steel pipe (in welded and seamless) in case of corrosion of high-temperature applications.
Sanitary tubing usually in stainless material and referred standards is ASTM A270. In case the pipe or tube coming in direct contact with sensitive products like food, water, or drink, it is what we called sanitary tube. In these situations, sanitary tubing has good performances of corrosive resistance, no tarnish, and is easy to clean.
Based on the usage, different levels of tolerance (diameters and thickness) shall be applied as in ASTM A270.
When the usage is in cylinders, bearings or other hollow formed parts, there is a usage for mechanical purposes. The tubing that is available can be manipulated easily and it results in a wide range of cross-sectional shapes, or even shapes that are round or the ones that need to fit in the cross-section. It finds widespread usage in case of mechanical tubing.
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MATERIALS &#;
We offer a wide variety of stainless steel pipe to fit your application:
SPECIFICATIONS &#;
ASTM A312 &#; This specification covers seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service. Grades TP304H, TP309H, TP309HCb, TP310H, TP310HCb, TP316H, TP321H, TP347H, and TP348H are modifications of Grades TP304, TP309Cb, TP309S, TP310Cb, TP310S, TP316, TP321, TP347, and TP348, and are intended for service at temperatures where creep and stress rupture properties are important.
ASTM A335 &#; This specification covers nominal wall and minimum wall seamless ferritic alloy-steel pipe intended for high-temperature service. Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Selection will depend upon design, service conditions, mechanical properties, and high-temperature characteristics.
ASTM A814 &#; This specification covers two classes of flanged and cold-bending quality cold-worked straight-seam single or double welded austenitic steel pipe intended for high-temperature and general corrosive services. Grades TP304H, TP304N, TP316H, TP316N, TP321H, TP347H, and TP348H are modifications of Grades TP304, TP316, TP321, TP347, and TP348, and are intended for high-temperature service.
ASTM B165 &#; This specification covers nickel-copper alloy UNS N in the form of cold-worked seamless pipe and tube. The material shall conform to the composition limits specified. Tension test, hydrostatic test, nondestructive electric test, and rounding method shall be done in accordance to the specified requirements.
ASTM B167 &#; This specification covers nickel-chromium-aluminum alloys (UNS N), nickel-chromium-iron alloys (UNS N, N, N, N, N, N, N, and N),3 nickel-chromium-cobalt-molybdenum alloy (UNS N), nickel-iron-chromium-tungsten alloy (UNS N), and nickel-chromium-molybdenum-copper alloy (UNS N) in cold-worked annealed, hot-worked annealed, and hot-finished seamless pipe and tube intended for general corrosion resistant and heat resistant applications.
ASTM B619 &#; This specification covers welded pipe of nickel and nickel-cobalt alloys (UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS N; UNS R; UNS N; UNS N; UNS N; UNS N; UNS N; and UNS R).
ASTM B622 &#; This specification covers seamless pipe and tube of nickel and nickel-cobalt alloys (UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS R, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, UNS N, and UNS R).
Note: This is summarized information from ASME Specifications current as of -01. For additional information on the ASTM Specifications please visit: astm.org
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