Seamless Tubing with External Upset Ends and Couplings Hydrosulfite and Cold-Resistant

The tubing per this TU is meant for regular operation in corrosive hydrosulfide media with parameters specified in Table 5 "Safety Regulations for Petroleum and Gas Industries".

TU 1308-206-0147016-01

The tubing per this TU is meant for regular operation in corrosive hydrosulfide media with parameters specified in Table 5 "Safety Regulations for Petroleum and Gas Industries". Besides, the tubing has enhanced corrosion resistance at well treating with hydrochloric acid and is cold-resistant up to temperature -50°C.

The general corrosion rate for tubing metal is not more than 0.5 mm/year.
The tubes are manufactured with strength group Es with range as per GOST 633-80.

The range of tubes, subs and couplings is specified by Table 1.
Tube type Outside Diameter
mm
Tube wall thickness,
mm
Strength group
With Externally Upset Ends
(NKV)
as per GOST 633-80
73,0
89,0
5,5 : 7,0
6,5 : 8,0
Es
Mechanical properties of tubes and couplings are specified by Table 1.1.

Parameter description

Strength group
Es

Tensile strength, σt,
N/mmІ (kgf/mm2),
not less than

657 (67)

Yield strength, σy,
N/mmІ (kgf/mm2),
not less than
not more than

549 (56)
657 (67)

Ratio σy/σt,
not more than

0,9

Rockwell hardness,
not more than

98 HRB

Elongation, δ5, %,
not less than

16

Impact strength at Charpy specimens,
J/cmІ (kg cm/mm2),

at test temperature -50°C
not less than
KCV-50°C.

98(10)

Share of ductile component (V) at
test temperature -50°C %,
not less than

70


Table 5 from "Safety Regulations for Petroleum and Gas Industries"

Produced fluid type

Hydrogen sulfide concentration,
volume percent in respect to the whole gas phase volume (in g/m
3 of gas)

Pressure abs., Pa (atm)

Humid gas or watery (with traces of water) oil with gas factor above 890 Nm3/m3

up to 0.075 (up to 1.15)
0.075-10.0 (1.15-154)
above 10.0 (above 154)

PH2S > 345 (352х10^-5)
Рsum> 45х 10^4 (4,6)
At any values of PH2S and Рsum

Humid gas or watery (with traces of water) oil with gas factor less than 890 Nm3/m3

up to 0.02 (up to 0.31)
0.02-4,0 (0,31-61)
4.0-15.0 (61-228)
above 15.0 (above 228)

PH2S > 345 (352х10^-5) Рsum> 1,83х10^6 (18,6) PH2S > 6,9х10^4 (0,7)
At any values of PH2S and Рsum

The tubes are manufactured in version A per GOST 633-80.
In coordination with client the tubes can be manufactured with the length up to 11 meters.
The tubes are manufactured from tube shell made from steel 30 KhMBFA.



Tech & Service of Seamless pipe

Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.

How to make seamless pipe(seamless pipe process)?
Hot Piercing Workshop
Piercing process
The cross roll piercing and pilger rolling process in the size range from approx. 250 to 660 mm outside diameter.
Precision cold drawn steel tube production process
Pipe weld cracks
often follow different mechanisms can be divided into two types of thermal cracking and cold cracking.
How to calculate a steel pipe and tube theoretic weight
Calculate a steel pipe?
Pipe fittings are necessary to join together pipes, or to change the direction of an existing pipe.
Pipe beveling
Pipe beveling is the process where an angle is formed between the edge of the end of a pipe or tube and a plane perpendicular to the surface.
Steel pipe cutting machine
Pipe cutting
Cutting tools have a grinding wheel piece cutting machine (also known as toothless saw), hand saw, cutter and other hand tools.
Packing the steel pipes
There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method.


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