Custom Spiral Welded Steel Pipe Manufacturing
EFTCG Steel. We manufacture industrial pipes in the spiral welded steel pipe group. Spiral welded steel pipes are produced in our Adana facility in accordance with the standards for large-scale applications. It offers a wide range of custom fabrication and fittings in addition to steel pipe fabrication. Spiral welded steel pipe is generally used in oil and gas installations, water pipelines, pipe networks, steel structures.
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spiral welded steel pipe
We produce new generation technological special spiral welded steel pipes with our EFTCG Steel Pipe Engineer staff.
Pipe Concrete Coating
Pipe concrete coating is a type of coating that is applied only to the inside of the pipes, especially in drinking water lines.
EFTCG Steel Pipe
Pipe Epoxy Coating
Pipe epoxy coating is the method applied to make pipes more resistant to corrosion and long-lasting.
Pipe Polyethylene Coating
Pipe polyethylene pipe coating is generally the outer coating method of spiral welded pipes to be laid underground.
Steel Pipe Usage Areas
The usage areas of steel pipes are quite wide. In this direction, you can find the list of steel pipe properties and usage areas below.
Features:
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- High strength
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- Resistance to pressure and impacts
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- High carrying capacity
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- Continuity and longevity
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- Flexibility
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- Ductility
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- Easy styling feature
Usage areas:
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- In Oil Pipelines
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- In Gas Distribution Lines
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- In Water Distribution Lines
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- On Foundation Piles
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- In Industrial Pipe Network
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- In Steel Structures
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- In Compressed Air Lines
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- Transportation of Liquid Hydrocarbons in Refineries
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- Conveying High Temperature Water
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- Storage Applications of Hydrocarbons
Related Formulas
Related formulas in pipe production.
1. Weight Calculation of Flat End Pipes:
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W= 0.02466 (Dt) xt, (kg/m)
D : Pipe Outer Diameter (mm)
t : Pipe Wall Thickness (mm)
W : Pipe Unit Weight (kg/m)
2. Hydrostatic Test Pressure :
3. The hydrostatic test pressure is found by the calculation method that includes a stress lower than the yield stress of the steel.
P : Hydrostatic Test Pressure (bar)
k : Calculated Percentage of Yield Stress
s : Determined Minimum Yield Stress (MPA)
t : Pipe Wall Thickness (mm)
D : Pipe Outer Diameter (mm)
P= 20 xkxsxt
D
4.According to API 5L;
GradeA: k=0.60
GradeB: k=0.60
X42 - X80: k= 0.60 OD < 5 9/16 in
: k= 0.75 OD 6 5/8-8 5/8 in
: k= 0.85 OD 10 3/ 4 -18 in
: k= 0.90 OD > 20 in
5.3 Unit Surface Area:
A= D x Pi x 10(-3) (m2/m)
A : Unit surface area (m2/m)
D : Pipe outer diameter (mm)
Coal Tar Enamel And Bitumen Coating
Following the sandblasting process, primer is applied to the pipe surface, which ensures adhesion between the surface and the coating. The centrifuge method is used inside the pipe and the winding method is used outside. Glass fiber is warmly impregnated with bitumen or coal-tar enamel and wrapped around the pipe.
While the pipes with the outer coating of bitumen are covered with lime, a protective layer of rock shield is wrapped over the pipes covered with coal-tar. Bitumen and Coal-tar Enamel coatings are generally preferred for exterior coatings of drinking water lines due to their low cost.
Standards used:
AWWA C-203, DIN 30673, TS 4356, BS 534
Pipe Polyethylene Coating
We provide services in pipe polyethylene coating.
1. Oil, rust, dirt, etc. on the pipe surface. Sandblasting is done to remove substances such as such and to obtain suitable roughness.
2. Sandblasted Pipes are heated up to 200°C.
3. Molten powder epoxy paint, which provides corrosion resistance, is applied to the heated pipe surface electrostatically by means of special paints and guns.
4. In order to ensure the adhesion between the powder epoxy paint and the polyethylene layer, the adhesive film layer obtained by the extrusion method is wrapped on the pipe surface. Pressure is applied on the wrapped adhesive film layer by means of silicone rollers.
5. The polyethylene layer obtained by the extrusion method is wrapped on the rotating pipe and pressed with a silicone roller.
6. When the polyethylene layer coating process is finished, water is sprayed to cool the pipe surface and the pipe temperature is reduced to 60°C.
Pipe Epoxy Coating
Pipe epoxy coating is applied to the cleaned and suitable rough surface by airless spraying method after sandblasting the inner or outer surfaces of the pipe in accordance with customer requests and standards.
While solvent-free epoxy is generally preferred in drinking water projects, flow coat epoxy is applied in natural gas pipes and coal-tar epoxy or glass flake epoxy is applied in pile pipes.
Standards used:
AWWA C-210, NFA 49709, TS EN 10289
Pipe Inner and Outer Coating
Pipe inner and outer coating is made for many purposes. Special coatings are made in cases where the pipes must be protected from external factors and the liquid to be transported must be hygienic.
BENEFITS OF INTERNAL / EXTERNAL INSULATION
Mechanical Strength and Impact Resistance
Uninstall / Download
Transport
stocking
Assembly
Burying Underground
Resistance to Physical and Chemical Changes
Thermal Aging
Ultraviolet Rays
Corrosive Soil
Fresh Water
Saltwater
Micro-Organisms
Atmospheric Corrosion
Water vapor
Cathodic Separation
Reducing Friction
ISOLATION STANDARDS
Internal - External Bitumen Coating
TS 4356, DIN 30673, BS 4147
Inner - Outer Coal - Tar Enamel Coating
TS EN 10289 - 2004, AWWA C - 203
Interior - Exterior Coal - Tar Epoxy and Solvent Free Epoxy Coating
TS EN 10289 - 2004, AWWA C - 210
Outer Polyethylene Coating
TS 5139, DIN 30670, DIN 30672
Inner Cement Mortar or Additive Cement Mortar coating
TS 8590, AWWA C - 205, DIN 2614
Pipe Connection Details
Pipe connection details
Welded Connection:
It is the most commonly used connection type in steel pipes. The pipes are shipped with a special machine with the welding mouth opened in accordance with the standard.
Spherically Welded Connection:
Allows rotation to line up to 10° without using special steel parts. It is welded from the outside after it is mounted in accordance with the angle.
Cylindrical Welded Connection:
It is especially used for pipes covered with concrete inside. It is welded externally after assembly.
Flanged Connection:
After the specially manufactured flanges are welded to the pipe ends, the flanges are connected with bolts.
Sigurmuf Connection
Elastic Coupling Connection
Pipe Production Specifications
Pipe production specifications are as follows.
Annual Production:
150.000 Tons
Pipe Length:
6 - 16 / 25 m. (standard and special production up to 24 m.)
Outer Diameter:
165.1 - 2540 mm.
Wall Thickness:
3 - 26 mm.
Raw material:
Hot rolled sheet in coil, in requested quality
Welding Method:
Submerged arc welding
Pipe Production Standards
Our factory, which was established to produce pipes in accordance with the pipe production standards API standard, also produces pipes in accordance with AWWA, DIN, BS, ASTM and Turkish Standards and serves oil, gas and water pipelines and construction projects. Spiral welded steel pipes are produced in the following standards according to their intended use.
Oil and Gas Line Pipes:
API Spec 5L, TS 6047-1 EN 10208-1 , DIN 17172, GOST 20295
Water Line Pipes:
EN 10217-1, DIN 1626, AWWA C200, DIN 2460, TS 9341 EN 10224 , UNI 6363
General Purpose Pipes:
BS 3601, DIN 1626
Staking Pipes:
ASTM A 252
Pipe Joint Parts:
AWWA C208, TS 9341 EN 10224
Pipe Production Flow Diagram
Pipe production flow diagram is as follows at the manufacturing level.