Stainless pipe

Our company supplies high-quality stainless steel of domestic and foreign production. Pipe rental is sold in small and large wholesale, and by prior arrangement, at retail. The offered assortment contains many product sizes and grades of stainless steels. A modern warehouse complex provides comfortable and efficient service around the clock. The stainless pipe is processed, packaged and shipped at a convenient time for the buyer. Rendered metalworking services: grinding and cutting stainless steel in size. Custom-made deliveries, storage, certification and delivery of products to various regions are possible. Constant monitoring of the market and direct cooperation with manufacturers allows us to provide affordable prices for rolled metal. You can clarify the availability and cost of products sold by our managers by phone or through the feedback form on the "Hot Line" page.

Electric-welded round pipes EN 10217-7, EN 10296-2

product name	Stainless steel surface	Diameter mm	Wall mm	Length mm	Weight 1 lm, kg	Price, rub./s.m
Stainless steel pipe AISI 201	polished (600 grit)	12-60,3	1-2	6000	0,275-2,209	from 84.70
	matte	10-101,6	1-3	6000	0,225-4,988	negotiable
Stainless steel pipe AISI 304	polished (600 grit)	10-104	1-3	6000	0,225-5,108	from 135.00
	polished (240-320 grit)	10-88,9	1-3	6000	0,225-4,352	negotiable
	matte	6-711	1-8	6000	0,125-140,825	from 80,00
Stainless steel pipe AISI 316 / 316L	polished (600 grit)	16-50,8	1,5	6000	0,545-1,852	under the order
	matte	6-711	1-8	6000	0,125-140,825	negotiable

Seamless round pipe GOST 9940-81, GOST 9941-81

Stainless steel profile pipes EN 10296

product name	Width mm	Height mm	Wall mm	Length mm	Weight 1 lm, kg	Price, rub./s.m
Square pipe AISI 201	10-100	10-100	1-5	6000	0,294-12,359	negotiable
Pipe rectangular AISI 201	20-120	10-80	1-5	6000	0,453-13,728	negotiable
Square pipe AISI 304 / 304L	10-300	10-300	1-12	6000	0,294-111,227	from 170,50
Rectangular pipe AISI 304 / 304L	20-400	10-200	1-12	6000	0,453-111,227	from 157.50
Square pipe AISI 316L / 316Ti	10-300	10-300	1-12	6000	0,294-111,227	under the order
Rectangular pipe AISI 316L / 316Ti	20-400	10-200	1-12	6000	0,453-111,227	under the order
Square pipe AISI 430	20-40	20-40	1-3	6000	0,613-3,602	negotiable
Pipe rectangular AISI 430	30-60	15-40	1-3	6000	0,693-3,363	negotiable

Stainless steel food pipe EN 10217-7, DIN 11850

Stainless pipe for TEN EN 10217-7

Application area

Corrosion-proof pipes are made by rolling round billets or welding strips. The resulting products are highly resistant to aggressive environmental factors, durability and reliability. The scope of their application affects many sectors of modern industry. Corrosion-proof pipe of circular cross section is used in gas and water supply systems. Due to the high hygiene, stainless steel is in demand in the food and medical industries. Seamless products are used for laying critical sections of oil pipelines. A stainless pipe with a square or rectangular profile is the main element of most building structures. This is mainly due to the beneficial properties of chrome steel and the effective form of the product itself. She was able to replace other, heavier and more expensive materials (beams, columns or fittings). Stainless steel mirror pipe is used in interior design and mechanical engineering. Thus, we can safely say that this type of metal has received maximum distribution in the national economy.

Corrosion-proof pipe (GOST-9940 81/9941 81) is widely used for pumping liquids with aggressive characteristics in petrochemical and chemical plants (round, not square), in the field of construction of watercraft and heat power engineering, general engineering and in the nuclear field, as well as in other industrial areas.

General characteristics of stainless steel pipes

Stainless steel pipe is a hollow and straight profile of different sections. Given the cross-sectional shape distinguish profile and round products. Today, stainless pipes are manufactured using one of three methods. The first involves the manufacture of products by folding the strip with further soldering of the joint with copper. The result is a soldered rolled stainless steel pipe.

Using the centrifugal casting method or cold or hot deformation, seamless pipe rolling is performed. In this case, the production of welded pipes occurs using plasma or laser electric welding. During this, the stainless steel is exposed to inert gases or high-frequency currents. This method makes it possible to make the cheapest products, since the manufacturing process does not take much time. In each case, pre-stainless steel is quenched. This requires that the raw materials lose a high level of hardness and strength during manufacture.

Advantages of Stainless Tubes

Stainless steel pipes have many advantages. The main thing is that the stainless product has increased corrosion resistance. And since it contains 20% chromium, it also provides excellent resistance to most negative environmental factors. Due to this, such metal rolling has an almost unlimited working time. It can be operated for over 400 years.

It is easy for stainless products to return their aesthetic appearance, since steel is a homogeneous composition. As a result of abrasions and scratches, it can be easily polished and sanded, providing these products with an attractive appearance. This pipe rental is perfectly combined with modern materials. The price of pipe rolling is relatively inexpensive, and the product mix has been very wide for many years.

A popular assortment of stainless steel pipes

Corrosion-proof pipes in accordance with GOST-9941 81

This standard, certified in the mid-1980s, describes seamless cold and heat-deformed tubular products made from general purpose corrosion-resistant steel. The diameter (outer) of these pipes varies from 5 to 273 mm, their walls have a thickness of 0.20-21 mm.

Pipe rolling products are manufactured standard (5-7 meters), as well as multiple measured and unmeasured lengths. The standard is quite loyal to consumer demands of corrosion-resistant products, therefore it allows their production from 0.5-15 m long. However, the manufacture of all non-standard tubular products by the plant must first be agreed with the customer.

I must say that in one batch of manufactured products of unmeasured length, pipes can be found:

• 0.5-0.75 meters (walls less than 0.5 millimeters);
• 0.75-1.0 meters (walls 0.50-1.0 millimeters);
• 0.75-1.5 meters (when their wall is indicated with a thickness of more than 1 millimeter).

In a batch of pipes with these sizes can be no more than 6%. All corrosion-resistant pipes are divided into products of high, ordinary and high accuracy. With this indicator in mind, such deviations (limit) of pipe production by wall thickness are permissible:

• 0.05-0.15 mm (normal accuracy);
• 0.03-0.10 millimeters and from -11% to + 12.4% (increased accuracy);
• from -11% to + 12.4% (high precision products).

The outer diameter of the pipe may have permissible error of 0.15 mm   (high precision) to 0.4 millimeters (conventional) or 0.7-1.3%. For pipes made of 06XH28 MDT steel with a cross section of more than 30 millimeters, a deviation of 1.2% is possible, a cross section of less than 30 millimeters is 0.45 mm.

Requirements for cold and heat-deformed stainless pipes

The ends of the finished pipeline are cut off (the cutting angle is straight), they are deburred, which can lead to the formation of a bevel and the formation of surface roughness. This is allowed by regulatory documents. Sometimes even customers negotiate with the manufacturer the need for bevels at the ends of pipe products, where walls over 5 mm, since it makes it possible to more efficiently and effectively make the connection of the pipeline by welding.

On any length of 1 meter, a stainless pipe can have the following curvature characteristics:

• 1 mm (walls over 0.50 mm, cross section over 5 mm);
• 2 millimeters (pipes with walls up to 0.50 millimeters and a cross section of 15 millimeters).

If we consider structures with walls less than 0.50 cm. With a cross section of up to 1.5 cm, then there is no special tolerance in GOST for this case. The main thing is that the products are made without sharp bends. The ovality of the rolled pipe should be such that the diameter of the products does not go beyond the permissible errors in terms of their outer diameter.

The described stainless steel products are manufactured. of these steel grades: 17Х18Н9, 08ХН28МДТ, 08Х17 Н15М3Т, 12Х18 Н12Т, 10Х23 Н18, 08Х18 Н10Т, 04Х18 Н10, 10Х17 Н13М2Т, 08Х13, 12Х17, 12Х18 Н10, 08Х22 Н6Т, 12Х13, 15Х25 Т, and some other highly alloyed metals. The density level of these alloys ranges from 7.6-7.97 g / cm. cubic meters, regarding temporary resistance - 37-587 kgf / mm. sq. and lengthenings - 16-46%.

These steel grades can include a small addition of rare-earth group metals, and at the same time meet all 5632 standards. Much attention is paid to the presence of sulfur in products, it cannot be more than 0.02%. The finished pipe is heat treated.

Stainless steel pipes in accordance with GOST-9940 81

The following GOST also gives a description of stainless pipes, but here we are already talking about products that are made using hot deformation. The outer diameter of these products is 56-326 millimeters, wall thickness - 3.4-32 mmthey are made from the same steel grades that are described in GOST 9941.

For many points, both standards are absolutely identical. Therefore, we will not repeat ourselves, but talk about the acceptance of finished products. It occurs in batches (they are completed from the identical geometric dimensions, brand of the initial alloy, and heat treatment of products). In one batch, you can complete no more than 200 products.

Let's look at the standards by which a stainless pipe can be produced, and the areas of its application.

We will touch on stainless steel profile pipes.

Standards

The standard by which a pipe is made depends primarily on the method of manufacture. The pipe production technology itself has already been repeatedly covered, and we will not focus our attention on it; We mention only the main points.

Welded pipe

Corrosion-proof pipes: GOST11068-81 are made from a flat billet. A narrow endless ribbon is formed from it, which is wound on a drum and, as necessary, is fed to the line.

There, the future pipe bends into a cylinder, the edges of which are welded using one of several methods:

• High frequency currents;
• An electric arc in an inert gas environment;
• By laser;
• Plasma
• Electron beams.

The latter method is used extremely rarely because of its high cost: all technological operations take place in a vacuum.

The assortment defined by GOST includes pipes from 8 to 102 mm with walls with a thickness of 0.8 to 4 mm.

Weld quality control - a mandatory stage in the production of welded pipes

Seamless pipes

Raw materials for them are round billets obtained by casting or pressing. Production includes several stages of roll processing: the pipe acquires the necessary diameter and wall thickness, calibrates, and then cuts into pieces of the required length.

According to the temperature at which the workpiece is rolled, they distinguish:

• Cold-deformed pipes;
• Heat-deformed;
• Hot deformed.

GOST 9941 81 cold-deformed and heat-deformed pipes are manufactured with an external diameter of 5 to 273 mm and wall thicknesses of 0.2 to 22 mm.

Corrosion-proof pipe: GOST 9941-81 has the following permissible deviations from the specified dimensions:

Pipe dimensions, mm	Extreme deviations with precision manufacturing
		increased
Outer diameter
with diameter: from 5 to 10
st. 10 to 30
st. 30 to 95
st. 95
Wall thickness
with wall: 0.2
from 0.3 to 0.4
from 0.5 to 0.6
from 0.7 to 1
st. 1 to 3
st. 3 to 7
st. 7

For hot-deformed pipes, another standard is used: they are produced according to GOST 9940 81. They provide pipe sizes from 57 to 325 millimeters with wall thicknesses from 3.5 to 32 mm.

Important: real pipe production is not limited by standard. By agreement with the customer, no one bothers to produce, say, a thicker or larger diameter pipe.

This standard also limits the maximum permissible deviations:

Pipe sizes	Limit deviations with manufacturing accuracy,%
Outer diameter
By wall thickness, mm:
more than 8 to 20

Areas of use

Stainless pipe has a unique set of properties:

• The highest mechanical strength;
• Resistance to corrosion and aggressive environments;
• High melting point;
• When processing the surface - an attractive appearance.

The properties and areas are determined in which the pipe is used marked “stainless” in the position of the price list:

• Water supply and heating systems;
• Pipelines in the food industry in contact with various products;
• Chemical industry with its extremely aggressive substances, which are often piped at high temperatures and pressures;
• Energy Here the strength and heat resistance of stainless steel is needed;
• Decor of interiors and buildings. Still, polished stainless pipes are not only durable, but also very beautiful material;
• The medicine;
• Shipbuilding;
• Automotive industry;
• Heavy engineering. What else can hydraulic cylinders be made where the pressures amount to thousands of atmospheres?

Let's look at some of the areas in more detail.

Plumbing and heating systems

From stainless steel they are obtained almost eternal.

The list of advantages is great:

• The corrosion-proof pipe is not subject to corrosion, does not grow;
• pipe erosion by suspensions and microparticles is theoretically possible, but in practice it will take much longer than the life of any building;
• A polished pipe looks very presentable and, when carefully executed, may not be cleaned under decorative boxes.

Fittings for water supply can be used the most simple, threaded. However, often water pipes from stainless steel are assembled using welding.

Tip: when using threaded connections, do not resort to synthetic sealing tapes and threads. TO

uda will be more reliable the grandfather's method checked by decades: the usual linen winding saturated with paint or drying oil.

The only drawback to using when creating a home water supply system is how hard it is to handle. Trying to thread it manually is simply useless; the manufacture of nozzles and drives on a lathe will require a particularly durable tool.

Recently, corrugated stainless pipes for water pipes using thread-tight fittings have appeared on sale. The reviews on them are still rather mixed, so at the moment it’s probably worth refraining from using them.

Use in the food industry

Stainless food pipe - this is usually a seamless pipe. The food industry can use welded pipes, but only those produced by welding with a TIG - tungsten electrode in an inert gas environment. This limitation is due to the strength of the seam and its tightness.

In addition, exclusively polished pipes are used in the food industry, and, of course, the inner surface is also polished. This is due to the fact that bacteria do not multiply on a perfectly smooth pipe: they simply have nothing to eat there. There are, so to speak, no folds in the area in which the remains of organic matter get stuck.

At the enterprises of the food industry, a significant part of the equipment is made of stainless steel. Of course, pipelines are no exception.

Chemical industry

And here, stainless steel strength and, most importantly, its ability to work in aggressive environments come first. Pipes made of steel 12h18n10t able to withstand temperatures up to 350C in solutions of acids and alkalis!

Of course, here we see exclusively seamless pipes: after all, even several molecules of the contents of the water supply system are sometimes unacceptable to leak. Yes, and there are huge pressures.

Energetics

And here, the strength of the stainless steel and its resistance to temperatures are also needed. Heat-resistant grades of stainless steels can operate at temperatures up to 1100 C. They are used, for example, to create cooling circuits for nuclear reactors.

Decorative applications

And in this area, the spectacular appearance of stainless steel pipes and its wear resistance are in demand. Of course, only pipes with a treated surface are used here; often also application.

In particular:

• polished oval pipe is often used for railings and decorative fences;
• square polished pipes 10 10, 20 20 and 40 40 can be found as frames for chairs, whatnots and other furniture;
• larger pipes - 50 50 and 60 60 - are popular as beautiful, extremely reliable and do not lose their luster handrails in supermarkets and sports facilities over time.

Of stainless steel is often made:

• Shelving and other commercial equipment;
• Racks and legs for furniture;
• Frameworks for canopies and cornices;

• Mufflers for cars and motorbikes and much, much more.

The medicine

The absolute chemical stability of the stainless steel makes it an ideal material for a variety of implants that are implanted in the body of prostheses and other medical equipment.

The most popular and well-known products from a stainless steel pipe are ordinary medical syringes. Rather, needles for them.

From the production point of view, any needle in the hands of a surgeon is a thin seamless stainless steel pipe

Conclusion

As you can see, stainless steel pipe is very popular in various fields, and this popularity is deserved. Let's hope that it will be useful to you.

The company "Verna-SK" offers a wide selection of metal, on the acquisition of specific positions, please contact our managers.

Classification of stainless steel pipes by steel grade

Three groups are usually distinguished based on the chemical composition of the material:

• austenitic steel grades - contain a large amount of chromium and nickel, have good corrosion resistance and strength;
• ferritic steel - similar to low-carbon, but more resistant to corrosion, contains from 11 to 17% chromium;
• martensitic steel grades - like ferritic ones, contain from 11 to 17% chromium, but include more carbon.

Thickness classification of stainless steel pipes

The following categories are distinguished depending on the ratio of diameter to wall thickness:

• especially thin-walled stainless pipe - ratio of more than 40 units,
• thin-walled - from 12.5 to 40,
• thick-walled - from 6 to 12.5,
• especially thick-walled - 6 or less.

Classification of stainless pipes by type of profile

The geometric section is one of the most important indicators of this product, it is customary to distinguish the following categories:

• stainless round pipe. It is characterized by diameter and wall thickness.
• Stainless steel pipes. Most often, square and rectangular sections are used.

Classification of round steel stainless pipes by manufacturing method

• Welded products. Such a pipe in production is made by welding the edges of a stainless steel sheet of the required thickness.
• Seamless products. The production of such a stainless steel pipe is based on passing an expander with a smaller diameter through a monolithic blank. Such a product is highly durable.

How is a cold-rolled stainless pipe different from a hot-rolled pipe?

The peculiarity of production during cold rolling is the processing of a steel sleeve at a temperature below the recrystallization threshold. The cold-rolled pipe must undergo the procedure of heat treatment of stainless steel. The resulting product has higher strength values.

What regulations should a stainless pipe meet?

Hot-rolled products are regulated by GOST 9940-81, and cold-rolled products are regulated by GOST 9941-81.

Classification of stainless pipes by coating

• frosted stainless pipes,
• polished
• mirror products.

Is stainless steel the only option or does such a pipe have an alternative?

The main competitor is PVC. But:

• stainless steel longer
• more environmentally friendly
• stainless water supply is safer for health,
• the material withstands higher temperatures.

How to purchase stainless pipes? Where to find affordable cost?

If you want to buy stainless steel pipes and you need a low price per linear meter, Verna-SK company offers a wide range of similar products. We have been working in the metal market since 2008 and have earned the trust of all our customers. Wholesale and retail sale of stainless pipes is our main profile. The main advantages of cooperation:

• you can buy a wide range of stainless pipes from the highest quality types of steel;
• in our company the lowest prices for running meter in Moscow;
• you can buy stainless pipes from us by contacting us by phone or directly on the site;
• we value the time of our customers, therefore, we guarantee prompt processing of your order;
• wherever you live, in Moscow or other regions of Russia, we will deliver the pipes you purchased from stainless steel as soon as possible.
• reputation has the highest price for us, so we provide an individual approach to each client;
• the entire range of our stainless steel pipes is subject to discounts and pleasant bonuses.

To buy your chosen product, take a look at our price list. Here you can check the current prices for stainless pipe per linear meter. Then, on the website or by phone, indicate how many tons you need, and you will find out what the final purchase price will be, taking into account discounts and bonuses. Remember, the cost of our product is always lower than its quality! To buy pipes from stainless steel grades in the Verna-SK company is profitable, fast and reliable!

19.10.2016

At present, stainless steel pipes are actively used in construction. Their diameter depends on several factors - the manufacturer's company, manufacturing method, wall thickness. In addition, it affects the parameters of the pipes and the purpose for which they will be used. The diameter is the length between the outer edges of the pipe. This distance is equal to two radii.

This indicator is measured in millimeters and indicated by a special sign ?. But, there is the only exception - the GOST 3262-75 samples in modern industry are usually measured by the inner diameter. Such models are designated by the symbol Du.

What are provided by state standards sizes of stainless pipes, table   will let you know in detail.

It should be noted that according to GOST 8734-75, thin-walled and cold-deformed pipes are distinguished. In the first case, models of such sizes are produced -2.5 x 0.3; 4.0 x 0.2; 10 x 4.0; 16 x 2.0; 20 x 3.0; 22 x 1.5; 38 x 1.0; 40 x 2.0; 60 x 1.8. As for hot-deformed samples, here the standard provides for the production of pipes, the parameters of which are 23 x 5.0; 26 x 4.0; 40 x 5.0; 48 x 6.0; 57 x 2.8; 60 x 4.5; 68 x 4.0; 75 x 5.0; 85 x 9.0; 102 x 10; 120 x 6.0; 133 x 3.0 160 x 4.5; 180 x 10.

According to experts, it is best to use pipes with a standard diameter in production. The pipe is corrosion-proof, the sizes in accordance with GOST   which belong to this category, allows you to work as simple as possible. If you have information about what the diameter is, then without any problems you can select all the necessary elements - plugs, transitions, fittings and so on. In addition, the diameter will allow you to calculate weight, size. The pipe is stainless, taking into account all these parameters will be most effective.

If the same diameter is noted, then the throughput of stainless models will be an order of magnitude higher than in the case of steel samples. All pipes according to the current standard are divided into three large groups - small, medium and large.

The first category includes those models whose diameter exceeds 50, namely - 59, 89, 108, 114, 159. Pipes of medium diameter are already respectively large. As a rule, there are models with sizes - 219, 325, 377, 530. There are other samples, but they are not used so often for one reason or another. And finally, the dimensions of stainless pipes of large diameter are 630,820,1220,1620. It should be noted that according to the standard, there are no restrictions. That is, it is quite possible to acquire pipes of larger sizes than the above.

Weight per meter stainless pipe   depends on the diameter. The mass is calculated taking into account the grade of metal used in the production. With information regarding the mass of the pipe, you can easily translate such data into lengths. The approximate weight of a running meter stainless pipes is specified in the relevant GOST.

Diameter in mm	Wall thickness in mm