The gas main Turkey-Russia "Blue stream "
Construction of the gas main Russia-Turkey
The gas main Russia - Turkey by extent of 1263 km is laid through
water area of Black sea. This unique engineering construction hasn't
got any analogues in a world practice of designing and construction
of the main pipelines. Open Society " Neftegazspetsstroy "
built two sections of the line:
" The first section by extent of 50 km in the head part of
the line in Stavropol region, diameter of pipes of 1420 mm.
" The second section by extent of 172 km in territory of Turkey
from Samsun to Ankara, diameter of pipes of 1220 mm.
The section from the port Samsun, situated on the Black Sea, crosses
the plateau Antolijskoe. There are flat segments, but the basic
part of a line passes through mountains at height up to 1000 m.
above sea level. The highest point was the pass Kyrykale (1200 m.).
A lot of transitions through the rivers, channels, roads were present.
Representation about the relief of land and complexities of a line
is given with such figure: the total length of curve one-tube sections
is more than 42 km.
It was required to complete with people and machinery two technological
streams. Machines and mechanisms partially were own, the missing
ones were leased. Completion by a labour was carried out according
to the daily-supervised schedule. Representatives of the Customer
- the Turkish firm, have arranged certification, carried out in
a small town Ikizdzhe for manual welders and directly on the site
of construction (72 km.) for operators of American welding complex
CRC-Evans. Representatives of the Customer carefully checked knowledge
and working skills of each our expert. The collective has successfully
sustained the check and less than in 10 months the basic works have
On October 24th, 2000 the brigade of welders of Open Society "
Neftegazspetsstroy " consisting of 16 operators (foreman N.I.Evdokimov)
has established the European record of pipeline construction for
10-hour change with equipment CRC-Evans: 154 joints were welded
(1,8 km. of pipes in of D 1220 mm.)
The same collective has reached the maximal productivity later month:
for 14 hours (the duration of works accepted in a world practice
at a line lining of pipelines) the brigade has welded 207 joints
of pipes in diameter of 1220 mm. Such brilliant result on the equipment
CRC-Evans was not reached by anybody in all European regions. It
is the result of the high qualification, the harmonious work and
integrity of all the collective of Open Society " Neftegazspetsstroy
On this gas main of 75 % of joints have been executed with the use
of automatic gas-shielded welding process gases and installations
of semiautomatic welding by a powder wire (technology "Innershield"),
25 % - piece electrodes with cellulose and basic coverage. On the
Turkish site of the gas main 100 % of joints welded by automatic
method, were exposed to not destructive control by ultrasound and
20 % - to the duplicating control with radiography by installations
of type " Krowler".
According to the control coordinator of company "ОХС",
the quality of executed works corresponded to all world standards.
By second month of works monthly average productivity of welding
has reached 26-30 km. The welding of "a red joint " on
the 5th of December 2000 became the closing stage in construction
of a linear part of a gas main Russia-Turkey on site Samsun-Ankara.
During the Stavropol gas main construction of the extent of 50 km.
it was necessary to perform a great volume of work. Except welding,
isolation, laying of pipes of D 1420 mm., it was required to enter
4 units of connection to operating gas mains, one unit of launching
and reception of clearing devices, cathodic protection, electric
supply lines, to carry out the underground transition of the river
Rasshevatka, two irrigating channels, the railway and some automobile
lines. Strong act of nature in the Stavropol and Krasnodar regions
has strongly complicated work on reclamation of grounds where it
was necessary to remove a fertile layer for the depth up to 80 sm.
In March 2002 work on a line of a gas main has begun. Basically
all the welding works were conducted by complex CRC-Evans and by
the same collective, which worked in Turkey. Owing to the excellent
organization of works, the collective has not only coped with tasks
in terms, but also has achieved record results - for 10 hour change
151 joints of pipes in diameter of 1420 mm. were welded. With an
advancing of the schedule the works on "piercing through"
of roads and railways, irrigation canals were carried out.
As a whole the construction of the unique in the technical and organizational
respect project of the gas main Turkey-Russia "Blue stream"
has come to the end in December 2002.