Seamless pipes
Seamless steel pipes for household purposes Seamless steel pipes for household purposes
ORDER
Range:
21,3 – 168,3 х 2,3 – 25,0 mm
Standard:
TU BY 400074854.062-2013 Rev. 1, 2

GOST 632-80, GOST 633-80

Dimensional tolerances
Outside diameter +1/-0.5%
Wall thickness -12.5%

API grade δ t MPa δ b MPa δ0.5 MPa
min max not less then not less then
D 379 552 655 14.3
K 490 - 687 12.0
E 552 758 689 13.0
L 655 862 758 12.3
M 758 965 862 10.8
R 930 1137 1000 9.5

GOST Р 53366-2009, API SPEC5CT(9р.) - 2011

Dimensional tolerances
Outside diameter, mm (inch) Tolerances
up to 114.3 (4.500) ±0.79 mm (±0.031 inch)
over 114.3 (4.500)   +1/-0.5%
Wall thickness -12.5%

GOST grade/API grade Type δ t MPa δ b MPa (GOST / API)
min max not less then
Н40 - 276 552 414 / -
J55 - 379 552 517 / -
К55 - 379 552 655 / -
L80 1 552 665 655 / -
N80 1 552 758 689 / -
Q 552 758 689 / -
Р110 - 758 965 862 / -

Pipes are supplied in hex-shaped bundles (weight not above 5,0 t) with robust steel strapping in at least 8 points with horizontal separation of bundles. Every bundle has two steel or textile handling loose strapping for multiple lifting.

Bundle size: 300x260 mm - 700x610 mm.

Every bundle has 2 grafiplast labels, specifying the following in English:

  • country of origin;
  • producer's trade mark;
  • size, ODxWTH, mm;
  • length, m;
  • standard;
  • contract №;
  • type of pipe;
  • steel grade;
  • heat№;
  • batch №;
  • bundle №;
  • number of pipes in a bundle;
  • total length of pipes in a bundle (actual), m;
  • bundle net weight, kg;
  • destination country;
  • when needed - additional marking.

Presented documents

  1. Invoice.
  2. Certificate of origin.
  3. Bill of lading.
  4. Mill's Test Certificate according to 3.1 DIN EN 10204:2005-01, according to 3.2 DIN EN 10204:2005-01.
  5. Packing list.
  6. CMR.

Control of pipe quality

  • Incoming inspection for billet;
  • Control of rough pipe geometry;
  • Control of hot-rolled pipe size;
  • Control of pipe cutting quality;
  • Control of pipe straightening;
  • Control of weight of individual pipe;
  • Special control of defects on pipe surface;
  • Control of internal dia. and total curvature of pipe;
  • Visual inspection of external surface of pipe on both ends, curvature control;
  • Testing pipes by hydro press with high pressure (to 500 bar);
  • Control of mechanical properties (including the one after heat treatment operation);
  • Chamfer quality control;
  • Special UT inspection (non-destructive testing) by NTD UT unit: external and internal differently oriented defects control, pipe wall thickness control, pipe length control;
  • Control of packaging, labels, marking, marketable condition of product.

The following is possible on Buyer’s request:

  • Hydro-testing.
  • Non-destructive testing by eddy currents according to producer’s method.
  • UT-inspection.

The laboratories conducting physic, mechanical, chemical and metallographic tests work in order to control technological production processes and quality of finished steel products. The Central Works Laboratories are accredited for technical competence in accordance with the requirements of the national standard STB/ISO MEC 17025 and DIN EN ISO 17025:2005.

To monitor production processes and evaluate the quality of finished products, there are laboratories that conduct physical, mechanical, chemical and metallographic tests. The CPL laboratories are accredited for technical competence in the main activities in accordance with the requirements of the national standard STB / ISO IEC 17025 and the standard DIN EN ISO 17025:2005.

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