Tubing in accordance with GOST 633-80

Long-lasting quality, best approaches

Pump-compressor pipes according to GOST 633-80
Conventional diameter pipes Wall thickness Type of pipes
Smooth With outwardly ends - B Smooth high-tight - NKM Coupled with outside ends - NKB
mm mm Strength group
27 3.0 - DKE - -
33 3.5 DKE DKE - -
42 3.5 DKE DKE - -
48 4.0 DKE DKE - -
60 5.0 DKE DKELMR DKELMR DKELMR
73 5.5 DKELMR DKELMR DKELMR DKELMR
73 7.0 DKELMR DKELMR DKELMR DKELMR
89 6.5 DKELMR DKELMR DKELMR DKELMR
89 8.0 - DKELMR DKELMR DKELMR
102 6.5 DKELMR DKELMR DKELMR DKELMR
114 7.0 DKELMR DKELMR DKELMR DKELMR
Name of the indicator Standard mechanical properties for steel strength
D K E L M P
Execution
A B
Temporary resistance σв, not less, MPa (kgf/mm²) 655 638 687 689 758 823 1000
(66.8) (65.0) (70.0) (70.3) (77.3) (83.9) (101.9)
Liquidity limit liquidity σ:
- not less, Mpa (kgf/mm²) 379 373 491 552 654 724 930
(38.7) (38.0) (50.0) (56.2) (66.8) (73.8) (94.9)
- no more, Mpa (kgf/mm²) 552 - - 758 862 921 1137
(56.2) - - (77.3) (87.9) (93.9) (116.0)
Elongation δ5, %,
not less
14.3 16.0 12.0 13.0 12.3 11.3 9.5
Smooth and couplings to them With landed outside
ends and couplings to them - B

Smooth highly sealed and couplings to them - NYOMU

 Coupled with planted outside
ends - NCB