GOST 550-75

JSC "Uraltekhmarket" offers Pipe rolling, appropriately GOST 550-75.

Cracking of hot-rolled seamless pipe is manufactured, have an optimum metal structure and other parameters and mechanical properties that ensure longer service life and also having the ratio of the gap, five times less than their rolled counterparts.


A special place among the pipes used in the modern industry, is a cracking pipe. This is not surprising, given the functions that they have. The main area of application is the chemical industry and cracking (high-temperature processing of crude oil into smaller fractions). And these terms of use, account for increased requirements for ductility and strength of the products and, as a consequence, the reduction of pressure losses during transportation of the working environment.

The range of outside pipe diameters from 25 to 630 mm, wall thicknesses from 2 to 30 mm. Basic normative documents, strictly regulating the process of fabrication of the pipes are:

  • GOST 550-75 seamless steel Pipes for petroleum refining and petrochemical industries. Specifications
  • TU 14-3R-62-2002 seamless hot deformed steel Pipes of steel grade 15H5M for the refining industry. Specifications.

The production of pipes cracking

Pipe cracking (GOST 550-75) is produced mainly by hot pressing of cast billets. Raw material is carbon and alloy steel, optimal steel grade 15H5M, which is strictly regulated by specified standards. Lately wide application was received also an analogue of steel 15X5M steel R5.

Products undergo heat treatment, hydraulic control, and a number of tests in accordance with the regulations. Shipped pipe cracking 15X5M or its equivalent with a full indication of its chemical and mechanical properties.

Classification of cracking pipes

Seamless steel tubes cracking can be:

According to the production method and material: cold-drawn (steel 10, article 20, St. 15H5M, art 12X8); hot-deformed (article 10, article 20, article 10G2, article 12KHM, article 15H5, 15H5M article).
Assortment: hot-pressed (GOST 550-75); cold drawn group A ( GOST 550-75A); cold drawn group B (GOST 550-75Б).

Marking code that has the pipe cracking, contains all necessary information for the consumer, includes data on the diameter (in mm) wall thickness (mm) length (multiplicity, the value in m or mm), normative document, according to which the pipe is produced, as well as about the grade of steel.

External diameter, mm

The length of pipes, m, not more, with wall thickness, mm

(1,5)

2,0

2,5

3,0

3,5

4,0

5,0

6,0

7,0

8,0

9,0

10,0

11,0

12,0

(13,0)

14,0

16,0

18,0

20,0

22,0

25,0

(19,0)

9,0

-

9,0

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

20,0

-

9,0

9,0

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

25,0

-

9,0

9,0

9,0

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

38,0

-

9.0

9,0

9,0

9,0

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

48,0

-

-

-

-

-

9,0

9,0

-

-

-

-

-

-

-

-

-

-

-

-

-

-

(57,0)

-

-

-

-

-

9,0

9,0

-

-

-

-

-

-

-

-

-

-

-

-

-

-

60,0

-

-

-

-

-

10,0

10,0

10,0

-

-

-

-

-

-

-

-

-

-

-

-

-

76,0

-

-

-

-

-

12,0

12,0

12,0

-

12,0

-

-

-

-

-

-

-

-

-

-

-

(80,0)

-

-

-

-

-

9,0

9,0

-

-

-

-

-

-

-

-

-

-

-

-

-

-

89,0

-

-

-

-

-

12,1

12,1

12,1

12,1

12,1

-

-

-

-

-

-

-

-

-

-

-

(102,0)

-

-

-

-

-

-

12,2

12,2

12,2

12,2

12,2

12,2

12,2

12,2

9,5

12,2

-

-

-

-

-

108,0

-

-

-

-

-

12,2

12,0

12,2

12,2

12,2

-

-

-

-

-

-

-

-

-

-

-

114,0

-

-

-

-

-

-

-

12,0

12,1

12,1

12,1

12,1

12,1

-

-

-

-

-

-

-

-

127,0

-

-

-

-

-

-

-

12,1

12,1

12.1

12,1

12,2

12,2

12,2

-

12,2

-

-

-

-

-

133,0

-

-

-

-

-

-

12,0

12,2

12,0

12,2

12,0

-

-

-

-

-

-

-

-

-

-

146,0

-

-

-

-

-

-

-

-

-

-

-

-

12,2

-

-

-

-

-

-

-

-

152,0

-

-

-

-

-

-

-

12.1

12,1

12,1

12,1

12,1

12,1

12,1

-

12,1

-

-

-

-

-

159,0

-

-

-

-

-

-

-

12,1

12,1

12,1

12,1

12,1

12,1

12,1

-

12,1

12,1

-

-

-

-

168,0

-

-

-

-

-

-

-

-

-

-

-

-

12,0

12,0

-

-

-

-

-

-

-

194,0

-

-

-

-

-

-

-

-

12,0

12,0

12,0

12,0

-

12,2

-

-

-

-

-

-

-

219,0

-

-

-

-

-

-

-

-

-

12,0

12,0

12,0

12,0

12.0

-

12,0

10,0

9,0

8,0

7,5

6,7

Notes:

1. Pipe, the dimensions of which are shown in parentheses, are used for repairs only.

2. In coordination with the consumer pipe can be made longer than indicated in the table. 1. This allowed the manufacture of pipes, welded, number of welds not more than one per pipe.

3. Pipe diameter up to 57 mm are made cold. Pipes with diameter 57 mm and more are manufactured hot.

4. On customer requirement tube diameter 6-102 mm are manufactured in length up to 7 m pipe diameter 108-159 mm produce length up to 9 m.


 Ovality and raznoshennoy pipes must not exceed:

group A - limit deviations for outer diameter and wall thickness for steel grades 10, 20 and 0.8 of the limit deviations for outer diameter and wall thickness for steel of other grades;

group B - tolerances for outside diameter and wall thickness specified in GOST 8732, GOST 8734.

The curvature of any section of pipe bands And should not exceed:

1.5 mm per 1 m,

the curvature on the whole length of the pipe should not exceed 8 mm.

The maximum curvature of the pipe B group - according to GOST 8732, GOST 8734.

 

Maximum deviations along the length of the tubes of groups A and B must not exceed:

+10 mm - at length of pipes up to 6 m;

+15 mm - at length of pipes more than 6 m, or of an external diameter exceeding 152 mm.

Examples of symbols

Pipe cold and warm with an outer diameter of 25 mm, a wall thickness of 2 mm, of steel grade 15H5M, length 9.0 m (group a):

Pipe A-25 x 2 x 9000 - 15X5M GOST 550-75

Hot-deformed pipe with an outer diameter of 219 mm, a wall thickness of 10 mm, of steel grade 15KH5VF, random lengths (group B):

Pipe B-219 x 10 - 15KH5VF GOST 550-75

The same length that are multiples of 4,5 m:

Pipe B-219 x 10 x 4500 cu - 15KH5VF GOST 550-75

 

The advantages of working with JSC "Uraltekhmarket"


  •  Pipe hot rolled - vast assortment

  •  quality and reliability, availability of certificates and licenses for products

  •  long-standing relationships with manufacturers

  •  the presence of branch offices and own warehouses

  •  friendly service and individual approach

  •  the possibility of online ordering catalog

ABOUT US

JSC "URALTEKHMARKET" is a team of qualified professionals.
The main objective of which is acquisition of enterprises products.
We work with companies in all sectors hozyayst.
Take on the role of OMTS.
Specilities in a more focused segment, we guarantee the optimum solution of tasks of any complexity.
This approach allows to minimize the cost of materials and logistics.

OUR SUPPLIERS

CONTACTS

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