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Steel Pipes and Tubes
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Last updated: 2018-02-04 23:16

The Concept of Stainless Steel Pipe

Stainless steel pipe is a kind of hollow steel, a large number of pipelines used for conveying fluids, such as oil, gas, water, gas, steam, etc., in addition, in the bending, torsional strength of the same time, the weight is lighter, it is also widely used in the manufacture of mechanical parts and engineering structures. Also used for the production of various conventional weapons, barrels, shells and so on.

Application of Stainless Steel Pipe

Stainless steel pipe safety and reliability, health and environmental protection, economic application, thin-walled pipeline and new reliable, simple and convenient connection method development success, so that it has more other advantages of the pipe can not be replaced, the application of the project will be more and more, the use of more and more popular, prospects.


Application of Stainless Steel Pipe

With the implementation of China's reform and opening-up policy, the rapid growth of national economy, urban housing, public buildings and tourism facilities to build a large number of hot water supply and living water supply put forward new requirements. Especially the water quality problem, people pay more and more attention, the request also unceasingly enhances. Galvanized steel pipe This commonly used pipe because of its easy to corrode, under the influence of the relevant national policies, will gradually withdraw from the historical stage, plastic pipes, composite pipe and copper pipe into the pipeline system common pipe. In many cases, however, the stainless steel tube is more advantageous, especially the wall thickness is only 0.6~1.2mm thin-walled stainless steel pipe in the quality of drinking water system, hot water system and safety, sanitation in the first water supply system, with safe and reliable, health and environmental protection, economic application and so on. Has been proved by domestic and foreign engineering practice is the water supply system is the best comprehensive, new, energy-saving and environmentally friendly pipe, is also a very competitive water supply pipe, will improve water quality, improve people's living standards play an unparalleled role.

In the building plumbing system, as galvanized steel pipe has been over a century of glorious history, a variety of new plastic tubes and composite tubes have been rapidly developed, but a variety of tubes also exist in varying degrees of some deficiencies, far from fully adapt to the needs of the water supply pipe system and the state of drinking water and related water quality requirements. Therefore, the experts predicted that the construction of water pipes will eventually return to the metal tube era. According to the overseas application experience, the thin-walled stainless steel tube is regarded as one of the best pipes in the metal tube.


Stainless Steel Tube Material


Standard for Implementation of Stainless Steel Pipe

GB2270-80 stainless steel seamless pipe

Stainless steel seamless pipe for gb/t14976-94 fluid transportation

Stainless steel Seamless pipe for gb/t14975-94 structure

Stainless steel seamless tubes for gb13296-91 boilers and heat exchangers

(gjb2608-96) (yb676-73) aviation structural steel thick wall seamless steel pipe

(gjb2296-95) (yb678-71) aviation stainless steel Seamless pipe

(yb/t679-97) (yb679-71) Aerospace 18A Hollow rivet thin-walled seamless steel tube

(gjb2609-96) (yb680-71) aeronautical structural thin-walled seamless steel tube

(yb/t681-97) (yb681-71) Aviation conduit 20A thin-walled seamless steel tube

GB3090-82 stainless steel small diameter steel pipe

gb5310-95 High pressure boiler seamless steel tube

gb3087-82 low medium pressure seamless steel pipe

GB3089-92 stainless acid-resistant thin-walled seamless steel tube

gb9948-88 petroleum cracking seamless steel pipe

ASTM A213 boilers, heat exchangers ferritic and austenitic alloy steel seamless steel tubes

ASTM A269 General purpose austenitic stainless steel seamless tubes and welded steel tubes

ASTM A312 austenitic stainless steel seamless tube welded steel pipe

ASTM A450 Carbon Steel, ferrite and austenitic alloy steel pipes-General requirements

ASTM A530 General requirements for Tiesue and alloy steels for specialized use

ASTM A789 General requirements for ferritic austenitic stainless steel seamless tubes and welded steel tubes

JIS G3456-88 mechanical structure Stainless steel pipe

JIS g3448-88 ordinary pipe stainless steel pipe

JIS g3459-88 Pipe Stainless steel pipe

JIS g3463-88 boiler, heat exchanger stainless steel tube

Q/hyad 101-91 Seamless long steel pipe for chemical industry

(0cr18ni11t) Q/hyad 103-91 00CR18NI5MO3SI2 Dual-phase stainless steel seamless Tube

Stainless Steel Pipe Classification

Classification by production method

(Seamless pipe--cold drawn pipe, extruded pipe, cold rolling pipe

Stainless Steel Seamless Pipe

Stainless steel seamless pipe is a hollow section with no seams around the strip steel.

Manufacturing process and process of seamless steel tube

Smelting > Ingot, rolling, sawing, skinning, piercing, annealing, pickling, upper ash, cold drawing, head, pickling > storage

Characteristics of Seamless Steel Tube

From the above process we can see: first, the thickness of the product wall thicker, it is more economical and practical, the thinner the wall, its processing costs will be greatly increased; Secondly, the process of the product determines its limitations, the general seamless steel tube precision Low: wall thickness uneven, tube surface brightness low, fixed ruler cost is high, And the inside appearance also has the hemp spot, the black spot is not easy to remove; Therefore, it embodies its superiority in high pressure, high strength and mechanical structure timber.

Welded Pipe

(a) by process classification-gas shielded welded pipe, ARC welded pipe, resistance welded pipe (high-frequency, low-frequency)

(b) by weld seam-straight seam welded pipe, spiral welded pipe

Stainless Steel Welded Steel Pipe

Welded steel pipe, is used steel plate or steel strip through the unit and die-forming after the welding steel pipe.

Manufacturing Process and Process of Welded Steel Pipe

Steel plate > Section > Molding > Dissolve > Induction bright heat treatment > inner and outer weld path treatment > Plastic > Sizing > Eddy current detection > laser diameter > Pickling > storage

Characteristics of Welded Steel Pipe

From the above process we are not difficult to see: first, the product is continuous online production, the thicker wall thickness, unit and the more the investment of the solution equipment, it is less economic and practical. The thinner the wall is, the lower the input-output ratio will be. Secondly, the process of the product determines its advantages and disadvantages, generally welded steel pipe high precision, uniform wall thickness, the appearance of the tube surface brightness high (steel plate surface level determines the brightness of the steel tube), can be arbitrary ruler. Therefore, it embodies its economic and aesthetic performance in the application of high precision and low pressure fluids.

Classification by Sectional Shape

(1) Round steel pipe

(2) Rectangular tube

Classification by Wall Thickness

(1) thin-walled steel Pipe

(2) thick-walled steel pipe

Classification by Usage

(1) Civil tube: divided round pipe, rectangular tube, flower tube, generally used in decoration, construction, structure and so on;

(2) Industrial pipe: industrial piping pipe, general piping pipe (drinking water pipe), mechanical structure/fluid transport pipe, boiler heat exchange pipe, food hygiene pipe, etc. Generally used in various fields of industry such as: petrochemical, papermaking, nuclear energy, food, beverages, medicine and other industries on the high demand for fluid media pipeline.