General information

Hot-rolled seamless pipe production facility was commissioned in July 2007.

The main production equipment of the facility is: pipe rolling plant including a cross-roll piercer, a 4-stand PQF® mill (Premium Quality Finishing mill to achieve highest quality of pipes) and a stretch-reducing mill for pipe production.

The pipe facility is able to process three billet diameters: 140, 160 and 200 mm (bars Ø 200 mm are planned for future expansion of the program).

The production shop includes furnaces, rolling stands, billet and batch saws, the corresponding finishing lines, transportation systems within the production shop as well as auxiliary equipment according to the description.
Based on PQF® technology rolling mills of the shop consist of:

• one piercing mill with mushroom-shaped rolls;
• one 4-stand PQF® mill with a stand for hollow bloom reduction and a retaining mandrel;
• one 3-stand extracting mill;
• one 28-stand stretch-reducing mill.

After the commissioning of the pipe mill more than 250 items of carbon pipe range have been commercialized.

JSC «BMZ» seamless pipe range is represented by the following dimension-types: finished pipe outside diameter 21,3 ÷ 168,3 mm (½ ÷ 6 inches), wall thickness range 2,3 ÷ 25,0 mm (0,095 ÷ 0,864 inches).
Finished pipe length: 6000 ÷ 15000 mm (19,685 ÷ 49,213 feet).

JSC «BMZ» pipes are used in engineering, oil production and construction, municipal engineering.
Over 80% of pipe products are sold outside the republic to buyers from 20 countries. Among pipe customers are such countries as: Austria, Czechia, Estonia, France, Germany, Great Britain, Hungary, Italy, Latvia, Lithuania, Norway, Poland, Slovakia, Spain, Turkey, the USA, Russia, China, Serbia, the Ukraine.

Production technology

Seamless pipe production process chain includes the following operations:

1. Billet storing	2. Billet cutting	3. Heating in the rotary furnace
4. Piercing	5. Elongation	6. Reduction
7. Cooling in the cooling bed	8. Pipe cutting	9. Straightening
10. Eddy-current control	11. Intermediate storage	12. Quenching (tempering) furnace
13. Quick cooling unit	14. Tempering furnace	15. Butt-end processing
16. Hydraulic testing	17. USC	18. Weighing, marking, packing
19. Shipping

Quality of the pipes manufactured correspond to Russian and foreign standards (GOST, DIN, ASTM, API 5L, EN). At the customer’s request pipes are produced and shipped according to aggregate standard requirements.

Pipe quality at different production stages is controlled with:

• «LASUS», wall thickness laser measuring system;
• two eddy-current surface defect detecting units;
• an ultrasonic unit for wall longitudinal cracks detection;
• a hydraulic tester to check pipe tightness with 80 bar pressure.

According to a customer’s requirement and/or in accordance with standard documents the following types of mechanical and technological tests are carried out:

• elongation test;
• bend test;
• hardness test (Brinell, Vickers, Rockwell);
• expansion test;
• flattening test.

According to a customer’s requirement pipes are covered with anticorrosive coating and protected with plastic plugs.

List of standard technical documentation for pipe products

Standard documentation designation	Name of standard documentation
GOST 8731-74	Hot-rolled seamless pipes. Technical requirements.
GOST 8732-78	Hot-rolled seamless pipes. Range of products.
DIN EN 10208-1-98	Steel line pipes for combustible materials. Performance specifications. Part 1 Pipes of ?-class requirements.
DIN EN 10208-2-96	Steel line pipes for combustible materials. Performance specifications. Part 1 Pipes of B-class requirements.
DIN EN 10210-1-2006	Hot-rolled hollow sections of unalloyed and fine-grain steel structures. Part 1 Delivery technical specification.
DIN EN 10210-2-2006	Hot-rolled hollow sections of unalloyed and fine-grained steel structures. Part 2 Tolerances, dimensions and performance of sections.
DIN EN 10216-1-2004	Seamless steel pipes for operation under pressure. Delivery technical specification. Part 1 Pipes of unalloyed steel with special properties for ambient temperature.
DIN EN 10216-2-2007	Seamless steel pipes for operation under pressure. Delivery technical specification. Part 2 Pipes of non-alloy steel with special properties for elevated temperature.
DIN EN 10216-3-2004	Seamless steel pipes for operation under pressure. Delivery technical specification. Part 3 Pipes of alloy, fine-grained steel.
DIN EN 10216-4-2004	Seamless steel pipes for operation under pressure. Delivery technical specification. Part 4 Pipes of non-alloy and alloy steel with special properties for low temperature.
DIN EN 10220	Seamless and welded steel pipes. Common table of dimensions and weight per length meter.
DIN EN 10255-2004+?1:2007	Unalloyed steel pipes for welding and threading. Delivery technical specification.
DIN EN 10297-1-2003	Steel seamless circular pipes for engineering and other branches of technique. Delivery technical specification. Part 1 Alloy and unalloyed steel pipes.
API SPEC 5L/ISO 3183-2007	Oil and gas industry. Steel pipes for pipeline transportation systems.
ASTM A53/A53M-07	Standard for hot-deformed galvanized steel pipes, welded and seamless.
ASTM A106/A106M-08	Standard requirements for seamless carbon pipes to be used at high temperatures.
ASME B36.10M-2004	Welded and seamless pipes of wrought steel.

Allowed deviation of dimension

Standard	Diameter limit deviation. mm	Wall thickness limit deviation mm
EN 10208	±0.75% or 0.5 mm bigger value is valid	+15/-12.5 %
EN 10210	± 1% or 0.5 mm bigger value is valid	-10 %
EN 10216-1	± 1% or 0.5 mm bigger value is valid	± 12.5% or 0.4 mm bigger value is valid
EN 10216-2	± 1% or 0.5 mm bigger value is valid	± 12.5% or 0.4 mm bigger value is valid
EN 10216-3	± 1% or 0.5 mm bigger value is valid	± 12.5% or 0.4 mm bigger value is valid
EN 10216-4	± 1% or 0.5 mm bigger value is valid	± 12.5% or 0.4 mm bigger value is valid
EN 10297	± 1% or 0.5 mm bigger value is valid	± 12.5% or 0.4 mm bigger value is valid

Range of hot-rolled seamless pipes without threading in accordance to EN 10255 - 284 KB.

Range of hot-rolled seamless pipes according to EN 10220:2002 - 285 KB.

Range of hot-rolled seamless pipes according to ASME B36.10, API 5L. ASTM A53. ASTM A 106 - 315 KB.

Mechanical properties - 208 KB.

Chemical composition of steel grades - 304 KB.

List of pipe certificates

QMS Certificates of Correspondence

N	Name	Validity
1	Certificate TUV CERT covering concast billets, rolled and profiled sections, wire rod, steel cord and wire, confirming conformity of QMS to the requirements of international standard ISO 9001:2000.	2009-09-05
2	Certificate issued by State Committee on standardization, metrology and certification of the Republic of Belarus covering concast billets, rolled product, steel cord and wire, seamless piping confirming conformity of QMS to the requirements of STB ISO 9001-2001.	2009-07-28
3	Certificate No.APIQR 0767 of quality management conformity with standard requirements ISO 9001:2008.	2014-11-03
4	Certificate No.Q1-0511 of quality management conformity with standard requirements API Q1.	2014-11-03

 

Product Certificates of Correspondence

N	Name	Validity
1	Certificate of compliance TUV-NORD No.07-701-PZ-1011-P01 for production of pipes from steel grades E235, E275, E315, E355 ø 21,3-168,3mm with wall thickness range 2,3-25mm to the requirements of DIN EN 10297-1:2003-06.	2014-02-17
2	Certificate of TUV-NORD No.0045-CPD-1011 for round billets and seamless hot-rolled shells from structural steel grades of groups S235 and S355 according to DIN EN 10025-2:2005, Appendixes A and  to DIN EN 10210-1:2006.	2010-02-17
3	Certificate TUV NORD (Germany) for production of hot-rolled billets and seamless pipes of ferritic steel grades according to AD 2000-Merkblatt W0.	2011-02-17
4	Certificate No.0629847 GOST-R ( State Standard) for general-purpose hot-deformed seamless pipes according to State Standard GOST 8732-78, GOST 8731-74	2014-08-11
5	API Certificate No.5L-0634 grants the right to use the Official API Monogram Spec 5L on plain end line pipes PSL 1(maximum grade X52), plain end pipe line PSL 2 (maximum grade X52N (Annex J)).	2014-11-03