GAZPROMTRUBINVEST
(Volgorechensk Pipe Plant)
Address: Russia, 156901, Volgorechensk, Kostromskaya obl., Magistral'naya str., 1
Tel.: +7(09453) 7-80-16, 7-85-13, 7-84-58; Fax: +7(09453) 7-80-30, 7-80-35
WWW: http://www.vrpp.ru
E-mail: truba@kosnet.ru
THE PRODUCTS MANUFACTURED:
LONGITUDINALLY ELECTRIC-WELDED PIPES AND SHAPES
Gazpromtrubinvest (Volgorechensk Pipe Plant) has begun manufacturing within the territory of the Russian Federation since 2000. The plant was established in order to organise pipe manufacturing and provide gas industry facilities with tubular products. High quality products are manufactured on the equipment supplied by the leading European companies.
At present, Gazpromtrubinvest is one of the newest and rapidly developing pipe works within the territory of the Russian Federation. The modern equipment allows the plant to produce high-quality products. The products have been certified in accordance with API-5L and API-5CT; and the quality system in accordance with EN ISO-9002 by the certification body of TUV NORD (manufacturing supervision and control organization).
Pipes manufactured by Gazpromtrubinvest exceed requirements of the applicable Russian standards (GOST) and the quality of products is highly rated by the representatives of the large gas and oil production companies (Tatneft, Rosneft, Beloyarneft, Purneftegaz, and others). The plant successfully provides its products on the international market.
The convenient geographical location of the plat in the centre of North-West region of Russia (close railroads and the large seaport - St. Petersburg, and also large raw material suppliers) reduces transportation costs and therefore the purchase price of the pipes.
LONGITUDINALLY ELECTRIC-WELDED PIPES AND SHAPES
Since 2000 the plant has begun manufacturing of longitudinally welded pipes with diameters 42-159 mm for pipelines with the operation pressure up to 5.5 MPa. The production of the profile pipes and tubing has been launched recently.
The modern equipment allows manufacturing of high-quality products. The quality of longitudinally welded pipes produced by the plant exceeds the quality of seamless pipes intended for the same use. The products of the plant are certified in accordance with API-5L and API-5CT, quality control system meets EN ISO 9002 requirements.
Technical characteristics of pipes manufactured by the plant exceed the requirements of the applicable Russian standards in many respects, and the quality of all products received the highest esteem of the main gas-and-oil industry representatives.
At present the plant maintains contacts with a number of foreign companies interested in tubular goods in conformance with the international standards.
The factory provides a wide range of services ordered at the purchaser request. The purchaser can specify supplementary requirements (different bevel angles, marking, conservation, additional packing tiers on bundles, etc).
The pipe welding mill equipment is as follows:
High quality products of Gazpromtrubinvest are evaluated by different international independent institutions of supervision and classification societies. The plant has certificates of the American Petroleum Institute API-5L and API-5CT Quality control systems are certified by TUV CERT, EN ISO 9002:1994, which allows to produce pipes according to DIN 2440, DIN 1615, DIN 1626, DIN 2395, ASTM A53.
The materials used in welded pipe manufacturing are as follows:
The main raw material suppliers are Severstal, Novolipetsk, and Magnitogorsk steel factories. Raw material supply without any delays assures the stability of the manufacturing process.
Longitudinally electric-welded pipes are intended for use in construction of:
Optional pipe size:
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Pipes with longitudinal electric welds |
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GOST, TU |
Size: D mm x t mm |
GOST, TU |
Size: D mm x t mm |
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GOST 3262-75 |
20 x 2.5-3.2 |
GOST 10705-80 |
42.0 x 2.0-3.0 |
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25 x 2.8-4.0 |
GOST 10704-91 |
48.0 x 2.0-3.5 |
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32 x 2.8-4.0 |
60 x 2.0-3.8 |
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40 x 3.0-4.0 |
73.0 x 2.0-4.0 |
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50 x 3.0-4.5 |
89.0 x 2.0-5.5 |
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65 x 3.2-4.5 |
108.0 x 2.0-5.5 |
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80 x 3.5-4.5 |
114.0 x 2.0-5.5 |
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100 x 4.0-5.0 |
127.0 x 2.0-5.5 |
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159.0 x 2.0-8.0 |
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GOST 20295-85 |
159 x 3.0-6.0 |
TU 14-3R-26-99 |
42.0-159.0 x 2.0-10.0 |
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Bent profiles |
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Square pipes, GOST 8639-82 |
20x20 x 1.5-2.0 |
Rectangular pipes, GOST 864568 |
40x20 x 1.5-4.0 |
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25x25 x 1.5-3.0 |
40x25 x 2.0-4.0 |
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40x40 x 2.0-6.0 |
50x25 x 2.0-4.0 |
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Oval flat pipes, GOST 8644-68 |
40x20 x 1.5-2.0 |
Knee, GOST 19772-93 |
60 x 40 x 3.0 |
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U-profile, GOST 8278-83 |
160x60 x 2.5-4.0 |
Casement section |
58 x 26 x 1.8 |
MANUFACTURING METHOD
At the beginning of the production cycle rolled steel enters the slitter and is cut into strips. The slitter design allows cutting of hot-rolled steels from 15 to 36 tons, width from 1000 to 1800 mm, and wall thickness of a strip from 2,0 to 10,0 mm.
One of the important conditions of high quality and pipe output increase is the continuous welding process and required strip edges preparation. The main technological operations are as follows: straightening of strips and strip edges welding in a butt-welder, the use of a modern strip spiral accumulator.
Pipe is formed from a strip on the forming stand and welded with high- frequency current. Alternative high- frequency current conducted through circular inductor instantly heats a narrow area along the strip edges to a melting point. Edges of the strip regularly heated approximately to melting temperature are pressed with rolls and welded without flux.
All the relevant parameters of welding: temperature, speed, current power and voltage are constantly automatically measured and optimized, providing high quality welding seam. Outside and inside flash is removed by flash trimmers. Right after welding, the weld area is normalized through pipe heating up to a required processing temperature, and cooling it within a water and air cooling line. This process stabilizes mechanical properties, the weld area and the base metal structure.
On a sizing stand the continuous pipe is accurately shaped, and its body is straightened. Then, at a certain distance, the pipe is marked with the lot number, strip number, shift, grade, etc. Program-controlled continuous pipe cutting machine moves together with the pipe and cuts it into definite lengths from 6 to 11,8 meters each depending on the purchaser order requirements.
After cutting, inside surface of the pipes. During that process, remnants of inner flash (bead), metal shavings and chips are washed out of the chamber with a jet of highly compressed liquid. The next stage is an additional straightening in a cross roll straighter. Two optional modes (bending or flattening) may be combined, thus increasing the level of straightening. Pipe ends finishing (with or without beveling) is done automatically with the help of an end-cutting machine.
At the end of the production cycle, after a number of quality control procedures (water pressure control at 850 Atm., ultrasonic control of pipe ends and magnetic flow control of pipe body), pipes are weighed, measured, marked at buyer's request and tied in hexagonal bundles (ranging from 3 to 6 tons in weight). At buyer's request, the outer surface of pipes may be temporally protected from corrosion with special coating.