VGP pipes: decryption of marking, how to choose, where they are used and how to make installation

Selecting the right materials for a home improvement project is essential to guaranteeing its longevity, effectiveness, and safety—especially when it comes to insulation and heating systems. VGP pipes are a crucial part of many such systems. These pipes are well known for being strong and adaptable in a variety of settings. Both homeowners and contractors can greatly simplify the selection process by being aware of what VGP pipes are and how they are marked.

VGP pipes are frequently identified by unique markings that specify their dimensions, composition, and compliance with standards. These markings are more than just a series of random digits and letters; they also include vital information that aids in matching the appropriate pipe to the appropriate task. Understanding how to interpret these markings can help you make more informed decisions when dealing with gas, heating, or water supply lines, improving the overall efficacy and safety of your installation.

VGP pipes can be used in more than one kind of installation. They can be used for both indoor and outdoor applications, such as industrial piping systems and residential plumbing, thanks to their sturdy construction. One of the benefits of knowing the various types and their appropriate applications is their versatility. Furthermore, although VGP pipe installation is simple for experts, it does call for specialized equipment and methods to guarantee a stable, long-lasting fit.

Selecting the appropriate VGP pipes requires more than just meeting specifications; it also entails being aware of the system’s requirements and the environment in which they will be used. By dissecting the markings, elucidating the specific applications for each type of pipe, and providing comprehensive installation guidance, this guide seeks to demystify the process. Whether you’re a seasoned contractor or a novice do-it-yourselfer, having this knowledge can help you choose the right options for the particular requirements of your project.

VGP pipe

What does VGP mean on the pipe marking? This particular kind of profile metal rolling has unique qualities. They have an improved seam that enables them to function and pump liquid under high pressure.

Marking and decryption

The VGP abbreviation is used for marking. How to interpret the VGP, which stands for a gas and water pipeline. Its function as a gas and water trunk is evident. Deciphered was another found designation: conditional passage.

Take into consideration the following example of how to interpret the marking on the VGP D50, which is a 2-inch-diameter metal roll, if the VGP DU25 is 1-inch.

Furthermore, the following titles are available:

  • “P” – deciphered as a product of increased accuracy;
  • "P" – the presence of thread;
  • "D" – a long thread;
  • "H" – a non -circular carvings;
  • "M" – a coupling;
  • "C" – galvanized coating.

Every product on a pipeline with a diameter greater than 159 mm and a wall thickness of 3.5 mm is marked. The marking is indicated on the label on the bag if the metal supply has a light surface or if the walls have a smaller diameter or thickness.

Non-washed paint is used to brand gas pipeline products. On products, the stigma is highlighted with a bright color and positioned between 20 and 500 mm from the edge.

The marking provides information about the product’s diameter and length, as well as the steel brand, manufacturer’s name, and trademark.

The label’s "country – manufacturer" inscription indicates that the product is of high quality and was intended for export.


Water and gas pipeline assortment, quality, and other attributes are listed in State Standard 3262-75. Their functional characteristics and application possibilities are outlined in this document.

A synopsis from GOST

  • galvanized species are heavier than “black” by 3%;
  • Mass discrepancies are possible by a maximum of 8%;
  • permissible curvature 2 mm per 1 m.

Wall thickness and the conditional passage (du) are given special attention in the description of the VGP pipes. GOST requirements must be met by both of these indicators and diameter. Standard passages: 8, 10, 15, 20 mm; GOST 3262-75-6.

Furthermore, the metal distribution is required to meet several requirements as stated in the VGP standards:

  1. Lack of bloating and chips;
  2. There should be no stratification and cracks from the ends;
  3. The cutting of the product is strictly at a right angle, the permissible discrepancy is 2 degrees;
  4. President burrs maximum 0.5 mm.

According to GOST, minor flaws like dents or mountain ash are possible, but they shouldn’t have an impact on a product’s ability to function.

Hygiene certificates for VGP pipelines are granted following successful completion of an epidemiological and sanitary examination.

Classification of water and gas pipes

Carbon steel is used as a raw material for gas pipes. The pipeline is shaped like a cylinder and ranges in size from 4 to 12 meters. It is arranged based on the manufacturing material, production process, and processing method.

Two varieties of metal exist.

  • Black – made of black steel, with a surface without a protective layer. The accuracy indicator is ordinary.

  • Galled by steel – has a zinc coating of 30 microns, due to it, the service life increases. These models are more accurately followed by the requirements of GOST in terms of length, wall thickness, external diameter, they have a high anti -corrosion ability.

Items that were once galvanized are no longer galvanized. Furthermore, conditional passage determines their differences in size. There is only a difference in the wall thickness and, consequently, the amount; the outer diameter remains unchanged. The aisle walls range in thickness from 2 to 5.5 mm, while their external diameter ranges from 10 to 165 mm.

The VGP pipeline is seamless and electric-welded:

  1. Seamless – steel products that do not have seams are used for its production. By the method of manufacturing are hot or cold. Cold -rolled models are more stable.
  2. Electric welding – made from rental sheets by welding or molding. There are straight -line ones – the seam runs along the pipe, spiralschy – seam in a spiral.

Furthermore, a gas and water pipeline is located:

  • without thread;
  • with carvings from both edges, which is applied or cutting.

Different pipe wall thicknesses rolling from "black" metal have an impact on how the pipe separates into:

  • lungs;
  • ordinary;
  • reinforced.

Use of light species is limited to 25 kgf/cm2; reinforced species are used at 32 kgf/cm2.

Advantages and disadvantages of use

Gas and water pipelines are a universal product with the following benefits:

  • high quality steel;
  • Increased resistance to corrosion – this is achieved due to the fact that the products began to galvanize, this layer protects them from the formation of rust;
  • the presence of reinforced seams in “black” models;
  • high strength, with insignificant weight;
  • resistance to increased pressure – which increases the service life;
  • The diversity in the choice is light, ordinary, reinforced;
  • variety of threads – it is possible to apply to order;
  • strict compliance with GOST – mandatory hydraulic control is carried out;
  • high quality, with a high price;
  • Large selection – seamless, hot rolled, with an electric weld, cold -rolled;
  • A variety of fittings – couplings, tees;
  • low expansion coefficient – is not deformed under the influence of temperatures;
  • has good thermal conductivity;
  • It is allowed to use in pressure structures;
  • sealant – can be used to deliver gas, acids.

The transported raw materials cool when they have a high level of thermal conductivity. It is advised to install extra thermal insulation when using a water and gas pipeline in order to prevent this.

The existence of welds, or more accurately, their subpar welding, is the only drawback.

Manufacturing technology

As per the stringent guidelines of GOST 1050, carbon steel is used to make both neocyrected and galvanized pipes. produced with great quality using automated lines.

There are two ways to manufacture things:

  • seamless – by rental or pressing;
  • with a seam – with the help of electric welding, a seam is made.

Species that are seamless have no seams. Produced either cold or hot. Hot deformation is a method used to create hot-formed models from a continuous workpiece.

The following techniques are used to produce cold-deformed objects:

  • the method of cold rollers;
  • By stretching.

Chemical, heat, and hydraulic testing are applied to all cold-rolled models. When compared to species produced using the hot method, they exhibit greater strength, reliability, and durability.

The following technology is used to produce welded species:

  • preparation of steel blanks (barks) – long metal stripes made according to GOST, the method of hot rollers;
  • bending of steel strips into pipes on specialized equipment;
  • Electric welding of the resulting junction.

Since this is the most vulnerable area, the seams on the welded gas and water pipes should be strengthened. As a result, an x-ray investigation is required.

VGP pipes are well-known for being dependable and simple to install, and they are frequently utilized for both indoor and outdoor plumbing. These pipes are marked with information about their diameter and wall thickness, which makes it easier for customers to select the ideal fit for their particular requirements. VGP pipes, which are typically constructed of galvanized steel, are especially well-suited for water supply and heating systems because of their ability to withstand high temperatures and corrosion. Selecting the right pipe requires an understanding of the markings, and in both residential and commercial buildings, proper installation ensures long-lasting performance and safety.

Where it is used

The range of applications for gas and water pipelines, including heating systems, low-pressure gas pipelines, and cold and hot water towers. The VGP pipes are joined in water lines using threaded joints or welding.

Nonetheless, the oil production industry as well as the agricultural sector use gas and water pipelines.

Steel pipes are also utilized in the construction of metal buildings, such as fences and tiny architectural forms.

How to choose what to pay attention to

Purchasing a gas and water pipeline from a reputable company is advised. It is important to consider the function, classification, technical specs, and operational circumstances when making a purchase. These times are specified in our previous article and agreed upon in GOST, the Handbook of the Metal Rolling.

The manufacturing process and the raw materials need special consideration. Galvanized species have a longer lifespan and are less vulnerable to corrosive effects.

The following size information is given to assist those who wish to buy VGP pipes:

  1. It is considered a measured length – from 4 to 12 meters;
  2. There is a nimer – but it should be within the framework of the measured.

All products go through quality control, but reanalysis is done in a dedicated laboratory upon client request. Every pipe undergoes a visual inspection on a curvature once more, and the quality of one product from the batch is verified.

It is best to entrust the matter to experts if you lack confidence in your ability to handle it.

Market prices

When purchasing, you should be aware that the price is typically set for one ton and is not per unit length but rather per unit mass. It is important to note that products with a galvanized coating cost 3% more than those that are simply "black."

The internal diameter and wall thickness have an impact on the price of steel models, which are determined by considering their technical characteristics. Light species, or those with thin walls, are less expensive than medium species, or those with thick walls.

The entire cost can be changed based on the size of the party. The price decreases with the size of the party.

Here"s the HTML table with tags table, tr, and td, containing information about VGP pipes:

VGP pipes are a sturdy option for a range of plumbing and heating systems. They are typically constructed from galvanized steel. They are perfect for delivering water and other fluids in residential and commercial buildings because of their sturdy design, which guarantees that they can withstand high pressure and temperature. It’s critical to comprehend the markings on VGP pipes, which provide information on dimensions, wall thickness, and material quality. With this information, you can make sure that the pipes you choose will meet your needs.

The application of VGP pipes goes beyond just moving water. They are also frequently employed in constructing durable and reliable heating systems and for air supply and exhaust ventilation systems. They are a great option for these kinds of applications because of their resistance to corrosion and capacity to tolerate mechanical stress. To preserve their integrity and functionality during installation, it’s critical to adhere to standard procedures. Cutting to size, threading, and properly sealing joints are some of the techniques that are usually performed by experts to prevent common mistakes that could jeopardize the system.

Ultimately, even though VGP pipes have a lot to offer, getting the most out of them requires proper installation and upkeep. To prevent leaks and preserve system efficiency, make sure that every component fits properly and is fastened firmly. Additionally, you can increase the lifespan of these pipes by routinely inspecting them for corrosion and wear. Whether you’re installing a new system or updating your old one, VGP pipes offer a sturdy base that will keep your house or place of business operating efficiently.

Video on the topic

What does SDR mean in the labeling of plastic pipes: formulas and examples

PNP pipes, how to read marking correctly

20 how to choose the correct diameter of the pipes

Marking on polypropylene pipes. Decoding

What type of heating you would like to have in your home?
Share to friends
Sergey Ivanov

I like to help people create comfort and comfort in their homes. I share my experience and knowledge in articles so that you can make the right choice of a heating and insulation system for your home.

Rate author
Add a comment