* Тechnical specification included in the Registry of Main Product Types Purchased by Transneft
** Тechnical specification included in the Registry of Gazprom Piping Products
Adapter pieces are used for connection of pipes varying on diameter and are designed to smoothen pipeline diameter change.
Reference example of forged & welded concentric transition for connection to pipe OD 720 mm and 530 mm, WT 14 and 10 mm, strength classes K56 and K54 accordingly, operating pressure 7.5 MPa at service factor m=0.6; climate design UKhL:
ENG: PShSK 720(14K56)х530(10K54)-7,5-0,6-UKhL
Spec. TU 1469-006-00153229-2009
Reference example of adapter piece acc. to GOST 17378-2001 for connection to pipe OD 108 and 76 mm, WT 6 and 4 mm of steel grade 10G2 (Cyrillic Г2):
|Norms and Regulations||Larger nominal diameter, DN||Smaller nominal diameter, dn||Operating pressure, Pop, MPa|
|Spec. TU 1469-006-00153229-2001||500… 1200||300… 1000||up to 11.8|
|Spec. TU 1469-006-00153229-2009||500… 1400*||300… 1200*||up to 11.8*|
|70… 1000**||40… 800**||up to 16.0**|
|Spec. TU 1469-035-00153229-2015||65…500||50… 400||up to 32.0|
|600…1000||400… 800||up to 16.0|
|1200…1400||600… 1200||up to 11.8|
|Spec. TU 1469-040-00153229-2017||65… 1200||40… 1050||up to 24.0|
|GOST 17378-2001||50… 500||20… 400||up to 16.0|
** ТDatasheets: Forged and forged& welded concentric transitions for Field Gas Lines.
The adapter piece are available in performance different from specified in the table (pressure, service factor or climate design) or for connection with piping of different thickness. The adapter piece are available with adaptor rings (strength up to K60, length at least 250 mm) acc. to SNiP III-42-80 upon request and may come with eternal insulation coating according to Specifications TU 1469-011-00153229-2012 and TU 1469-006-00153229-2001.