Welded Pipe for Drainage

Out diameter usually from 323mm to 1420mm. When the outer diameter is above 914.4mm it's allowed two straight welded seams.

Usage: Long distance transportation for oil, gas, liquid, coal gas, etc. inshore and offshore, also used as construction pipes, offshore platform, power station, petrochemical and civil construction, etc.

Outer Diameter: 219mm-1820mm (8'' ~70'')

Wall Thickness: 5.0mm-50mm

Length: 5.8mtr-18mtr

End: square ends (straight cut, saw cut, and torch cut). or beveled for welding, beveled,

Surface: Lightly oiled, Black, Bare, Varnish coating/Anti rust oil, Protective Coatings

MATERIAL: CS, LTCSQ235, Q345, ASTM A25, API 5L GR.B, X42, X46, X52, X60, X70, etc.

STANDARD: API 5L, ASTM A252, ASTM A672, ISO3183, GB/T3091, GB/T9711, etc.

【Product Features】

High Strength
The welded pipe for drainage uses high-frequency resistance welding (HFIW) technology to accurately connect high-quality low-carbon steel strips, forming a dense metallurgical bond at the weld, with a welding strength of more than 520MPa, which is 40% higher than that of ordinary drainage pipes.

Corrosion Resistance
The inner and outer walls of the welded pipe for drainage are both hot-dip galvanized, with a zinc layer thickness of 85μm, forming a continuous and dense protective film that can effectively resist the erosion of acid and alkali substances and microorganisms in sewage.

【Product Application】

Construction Engineering Field
In the construction engineering field, welded pipe for drainage is mainly used for indoor and outdoor drainage systems. It is responsible for quickly draining domestic sewage, rainwater, etc. out of buildings.

Municipal Engineering Construction
In municipal engineering construction, welded pipe for drainage is responsible for the collection and transportation of urban sewage and rainwater.

Industrial Production Field
In the industrial production field, welded pipe for drainage is used to discharge wastewater generated during the production process.

Agricultural Irrigation System
In the agricultural irrigation system, welded pipe for drainage is used for water delivery and drainage. It transports water during irrigation to ensure the water demand of crops; excess water can be discharged through it to prevent water accumulation in farmland, regulate soil moisture, and help agricultural production.

【Frequently Asked Questions】

What are the main materials of welded pipe for drainage?
Common materials for welded pipe for drainage are carbon steel, stainless steel and galvanized steel.

What are the anti-corrosion treatment methods for welded pipe for drainage?
Common anti-corrosion treatments for welded pipe for drainage include galvanizing, coating with anti-corrosion paint and lining with plastic.

How to ensure the slope when installing welded pipe for drainage?
Accurately measure and mark the slope line before installing welded pipe for drainage, and calibrate it with tools such as a level. The height of the pipe bracket is set according to the slope requirements to ensure smooth drainage and avoid water accumulation and blockage. The slope of indoor drainage pipes is generally 0.5%-1%.

How to connect welded pipe for drainage with other pipe fittings in the drainage system?
Welded pipe for drainage can be connected by welding, flange connection or groove connection.

Can welded pipe for drainage be used for high-temperature drainage?
Stainless steel welded pipes have good high-temperature resistance and can be used for high-temperature drainage; carbon steel and galvanized steel are easily oxidized and deformed at high temperatures and are generally not suitable for long-term high-temperature drainage environments.

How to avoid stress concentration when installing welded pipe for drainage?
Reasonably design the pipeline direction and bracket layout to avoid sharp turns; reserve expansion space and use expansion joints to cope with temperature changes; ensure that the pipe connection parts are installed correctly to reduce additional stress.

How to prevent scaling of welded pipe for drainage in the drainage system?
Smooth lining materials can be used to reduce scale adhesion; control the drainage water quality and reduce the content of calcium and magnesium ions; regularly perform chemical cleaning or mechanical descaling to keep the inner wall of the pipe clean.

What should be paid attention to in the transportation and storage of welded pipe for drainage?
Avoid collision and extrusion when transporting welded pipe for drainage to prevent pipe deformation and damage to the anti-corrosion layer; when storing, it should be placed in a dry and ventilated place, away from corrosive substances, and the bottom should be raised to prevent moisture and rust.

How to perform daily maintenance of welded pipe for drainage in the drainage system?
Regularly check the appearance, welds and connection parts of welded pipe for drainage to observe whether there is leakage or corrosion; clean up the debris at the drainage outlet to prevent blockage; repair the damaged anti-corrosion layer in time to ensure the normal operation of the drainage system.

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