Stainless steel tube is widely used in the market

Due to its advantages in materials, the application of stainless steel tube has been comprehensively promoted. As an important material in the pipeline. Stainless steel tube has obvious advantages in the market. Different from ordinary steel pipe, stainless steel pipe is made of alloy. Transportation, stainless steel pipe is mainly used for oil and gas transportation. Compared with ordinary transportation, pipeline transportation has more important significance.

Stainless steel rectangular pipe

Stainless steel rectangle pipe is a hollow strip steel pipe, a large number of used for conveying fluid pipe, such as oil, natural gas, water, gas, steam, etc., in addition, doing bending and torsional strength phase at the same time, the weight is lighter, it is widely used in the manufacture of machinery parts and engineering structures. Also commonly used for the production of various kinds of conventional weapons, barrel, shells, etc.

The causes of cracks in the 304 stainless steel pipe in the processing

304 stainless steel pipe is a more common type of stainless steel materials, many of the processing plant, 304 stainless steel pipe may occur in the process of machining line crack, scarring, surface defects such as inclusions, and scarring, these defects is roughly due to slab outer arc Angle of subcutaneous appeared transverse crack, there are tiny impurities mixed with in the crystallizer, finishing clean up without oxidation residue on the surface of the stainless steel pipe, as well as in the rolling process due to slab edges to the stainless steel pipe surface caused by the cartwheel.
These defects not only lower the quality of the surface of the stainless steel pipe, also had an impact to the ascension of the quality of the product, so do a good job in prevention and treatment of 304 stainless steel pipe surface defects is very important.

The cause of the stainless steel pipe rusting

Stainless steel pipe under normal circumstances is not easy to rust, but after exposure to chlorine and other harsh environments, or passivation layer surface is mechanically or chemically damaged, it is easy to rust than usual, so you see rusting stainless steel not surprising. Life is done with stainless steel passivation oxide, chromium oxide film thickness ratio of the surface of the fresh surface naturally formed film thickness, and are much more dense.

Introduction of corrosion resistance of 904L stainless steel pipe

In strong oxidizing nitric acid, compared with high alloy steel containing molybdenum, low corrosion resistance. In hydrochloric acid, the use of 904L stainless steel pipe is limited to a lower concentration of 1-2%. In this concentration range.

How to improve the corrosion resistance of stainless steel tube

How to improve the corrosion resistance of the stainless steel tube, yaang pipe industry knowledge to provide the following for your reference:

Why not easy to corrode stainless steel pipe?

Why not easy to corrode stainless steel pipe?

All metal and atmospheric oxygen in the reaction, formed in the surface oxide film. Unfortunately, in the ordinary carbon steel pipe on the formation of the oxidation iron oxide continue, kept expanding rust, eventually forming holes. Can use paint or resistant to oxidation of the metal (for example, zinc, chromium and nickel) on plating to ensure that the carbon steel pipe surface, however, as we know, the protection is only a thin film. If the cover was damaged, the following steel began to rust.

The classification and application of the stainless steel pipe

A, the classification of stainless steel pipe

1, according to the production method of classification:

(1) seamless tube, cold drawn tube, extrusion tube, cold rolling tube.

(2) welded pipe:

(a) according to the process classification, gas shielded welding pipe, arc welding, resistance welding pipe (high frequency and low frequency).

(b) the weld points - straight seam welded pipe, spiral welded pipe.

Use of stainless steel pipe material

SUS304 stainless steel pipe: with good corrosion resistance, heat resistance, low temperature strength and mechanical properties, stamping bending and other thermal processing is good, no heat treatment hardening phenomenon, no magnetism. Widely used in household items (1, 2 types of tableware), cabinets, indoor pipelines, water heaters, boilers, bathtub, auto parts, medical equipment, building materials, chemical, food industry, agriculture, marine parts.

Key points of welding of stainless steel pipe and points for attention

Welding of stainless steel pipe:
1 the use of vertical external characteristics of the power supply, the use of positive polarity (welding wire electrode)

The choice of materials and use of stainless steel pipe

Many variable factors are expressed in terms of corrosive medium characteristics, namely, chemical products and its concentration and atmosphere, temperature, time, so if the media do not understand the nature right to the use of materials, material selection is difficult. However, the following can be used as a guide for selection:

How to identify the authenticity of stainless steel pipe

How to identify the authenticity of stainless steel pipe?

There are four ways to identify the authenticity of stainless steel pipe.

One, Magnetic test is the most simple way to distinguish between annealed austenitic stainless steel pipe and ferrite stainless steel pipe. Non magnetic steel is austenitic stainless steel, but the high pressure after cold working with mild magnetic; and pure chromium steels and low alloy steels is strong magnetic steel.

What should pay attention to when making stainless steel reducer

Forming hole diameter is less than stainless steel reducer big end diameter of the tube billet, used in die forming along the tube billet diameter hole enlargement. Hole enlargement technology mainly to solve the stainless steel reducer in the variable diameter is larger not easily by reducing forming, sometimes according to the requirements of the materials and products forming, expanding and reducing method of combination.

Thread step and methods of stainless steel pipe fittings

Thread step and methods of stainless steel pipe fittings are as follows:
The thread sets before the first choice corresponds to the diameter of the die, according to sequence number 4 will die to turn into the hinge plate die chamber. Prior to loading, pay attention to the hinge plate on the iron sweep.

Micro-irrigation system calculate the diameter of the stainless steel pipe fittings at all levels

At all levels of micro-irrigation system, determine the diameter of the stainless steel pipe fittings and pipe section is one of the main task of the hydraulic calculation. Micro-irrigation system of capillary only 10 mm in diameter, and 12 mm, 15 mm, 20 mm, 25 mm to wait for a few kinds, in can choose directly based on the experience in the design of micro-irrigation system. Stem, the diameter of the pipe section should be calculated according to by the flow section O flow relations with stainless steel pipe section size is:

Assembling method of general stainless steel pipe fittings

General stainless steel pipe fittings assembly mode can be divided into roughly two categories: one kind is detachable, non-standard flange, thread and packing methods of connection. Another kind is not detachable type, important is connected by welding method. These two kinds of assembly way have different requirements in the installation.

The welding of stainless steel pipe fittings

The welding of stainless steel pipe fittings is a strong technical work. Only absolutely guarantee the quality of weld to ensure the safety of use.

Calculation of stainless steel pipe fittings materials by yaang.com

Calculation of stainless steel pipe fittings materials
Stainless steel pipe fittings are divided into many kinds, elbow, tee, sleeve, reducers, such as, and bearing in type, card type, butt type. Offer money to see what material and what process. , the formula of every enterprise divergent samples, and also more than a formula, strange size tee in price have can differ greatly, which is due to differences in component and process incurred.
The formula for calculating the actual weight of the stainless steel pipe per meter: w=0.02466 (D-S), the w refers to the actual weight per meter of stainless steel pipe fittings, D refers to the nominal diameter of stainless steel pipe fittings, s refers to the nominal wall thickness. Security refers to the premise and guarantee for honing standard rules now rules. The premise of guarantee needs in accordance with the standard rules and guarantee stop training, test results for the standard rules. The inspection will include the premise of chemical composition and mechanical function, size deviation, rough quality process function.

Source: Zhejiang Yaang Pipe Industry Co., Limited (www.yaang.com)

Stainless steel seamless pipe for oil and gas drilling by yaang.com

Oil and natural gas are the main driving force and chemical raw materials. International Power Agency (IEA) estimates: in order to meet the market demand, by 2030, the global oil and gas industry to invest about 200000000000 U.S. dollars a year, 80% of the investment in the middle east outside of the region.
In oil and gas exploration, drilling, transportation, refining and long interval sent to users of the whole process is inseparable from the stainless steel seamless pipe and oil and gas drilling is the professional's biggest user of stainless steel seamless pipe. Most of the cost of oil casing, ordinary take yield strength is 400 ~ 800MPa carbon steel and low-alloy steel manufacturing. And on of the erosion of the chloride ions and acidic gas (CO2, C02+H2S) (CL) oil, gas well, it needs to take resistant corrupt stainless steels and to nickel base alloy used for do oil casing and walks tube, which is stainless steel in the development of oil and gas has the widespread application prospect in the category.

Cause of rust and pollution of stainless steel pipe and notice by yaang.com

Stainless steel pipe products with excellent corrosion resistance, and not easy to rust, it is as I mentioned earlier, its composition containing chromium elements. Combines with oxygen in air and solid surface and form a tight-knit not state oxide, this does not scale membrane can prevent the steel surface oxidation (rust), and can play a role of protecting surface, in order to prevent the corrosion of various corrosion factors.