Galvanized Spiral Welded Pipe

Galvanized spiral welded pipe is a common steel product, which is processed by galvanized steel pipe and spiral welding technology. Galvanized treatment can effectively prolong the service life of the steel pipe, and also has the characteristics of anti-rust and anti-corrosion, so that the steel pipe can better withstand the influence of oxidation and corrosion during use, and achieve a more stable use effect.

Advantages Of Galvanized Spiral Welded Pipe

Galvanized spiral pipe welding method is first out of the forward end portion of the electrode about 5 ~ 7mm, without leaving a blunt edge technology for centralized control to ease the industry needs to pay attention to seriously handle groove dimensions and near-plated zinc layer.

For penetration, undercut the tendency will be very small, If the front and rear of the round-trip transportation technology is used, generally 1.5 ~ 2.5mm; to reduce zinc weld penetration, with a focus on playing groove industry downturn, such as the use of short welding slag such as J427, to leave some space sector is expected to greatly reduce the liquid zinc remain in the weld, when welding fillet welds, you can get no defects of welding quality. The welding precision can not be compared for the straight seam welding, large diameter pipes or some special pipes are all used the spiral welded pipe, because spiral welding welding density is big, welding up is very flexible, welded together can form a variety of changes. 

Unique features and advantages of galvanized spiral welded pipe

First of all, galvanized spiral welded pipe has good corrosion resistance. The galvanized layer can effectively prevent the contact between the steel pipe and the external environment, and avoid the corrosion and oxidation of the steel pipe by water, air and other factors. This enables the galvanized spiral welded steel pipe to be used for a long time in harsh environments such as humidity, acid and alkali, and greatly prolongs the service life of the steel pipe.

Secondly, galvanized spiral welded pipe has good strength and toughness. The spiral welding process can ensure that the joints of the steel pipes are firm and well sealed, and the overall strength of the steel pipes is improved. The galvanized layer has strong adhesion and is not easy to peel off, so that the steel pipe has better compressive and tensile strength. This makes the galvanized spiral welded pipe able to withstand certain pressure and impact, suitable for various projects and equipment.

In addition, galvanized spiral welded pipe has good thermal conductivity. Steel is an excellent heat-conducting material, and the galvanized layer can enhance the heat-conducting performance of the steel pipe, enabling heat to be transferred and discharged faster, ensuring the normal operation of the fluid. This makes the galvanized spiral welded pipe widely used in heating, hot water and other fields.

In addition, the production and processing technology of galvanized spiral welded pipe is relatively simple, and the cost is relatively low. Due to the adoption of the welding process, the production cost can be reduced and the production efficiency can be improved. And the coating of the galvanized thin layer will not increase too much material consumption, and can reduce the cost under the premise of ensuring the quality.

With its excellent performance and wide applicability, galvanized spiral welded pipe has become one of the indispensable materials in the field of modern engineering.

The application fields of galvanized spiral welded pipe are very wide.

In the field of construction, it is usually used as one of the main materials for structural support and light steel structure buildings, and can be used to build walls, roofs, floors and other parts. In addition, it can also be used to strengthen the structure of large-scale projects such as buildings and bridges, which plays an important role.

In the field of water and gas transmission, galvanized spiral welded pipe is also a very important pipe. For example, a large number of piping systems need to be installed in the upper and lower sewers, rivers, sewage treatment and gas pipelines, and the corrosion resistance and anti-aging properties of galvanized spiral welded pipes can ensure the long-term stable operation of the piping system.

Galvanized spiral weled pipes are widely used in different fields, and with the continuous progress of industrial technology and the improvement of environmental protection awareness, the quality and performance of galvanized spiral pipes have also been continuously improved. In the future, galvanized spiral welded pipes will continue to play an important role in the construction and industrial fields, creating a better and more comfortable living environment for people.

Standards for galvanized spiral welded pipes:

Chinese Standard:

GB/T 3091-2015 "Welded steel pipes for low pressure liquid delivery", This standard applies to straight seam electric welded steel pipes, straight seam submerged arc welded (SAWL) steel pipes and spiral seam submerged arc welded (SAWH) steel pipes for conveying low-pressure fluids such as water, air, heating steam and gas.

GB/T 9711-2017 "Petroleum and natural gas industries—Steel pipe for pipeline transportation systems", This standard applies to the manufacture, inspection, marking, coating, recording and loading of seamless and welded pipes for pipeline transportation systems in the oil and gas industry.

British Standard:

BS 1387 "Specification for heavy and ordinary welded carbon steel pipes", BS EN 10217-1 "Technical delivery conditions for non-alloy and alloy steels for welded steel pipes"

American Standard:

API 5L "Seamless and spiral welded steel pipes for pipeline transportation systems in the oil and gas industry", ASTM A252 "spiral welded and seamless carbon steel pipe piles"

Japanese Standard:

JIS G 3444 "Carbon steel pipes for general structures"

This standard specifies the size, shape, weight, technical requirements, test methods, inspection rules, packaging, marks and quality certificates of welded steel pipes for low-pressure fluid transportation.

Galvanized spiral welded pipes are widely used in construction, machinery, coal, chemical industry, electric power, railway vehicles, automobile industry, highways, bridges, containers, sports facilities, agricultural machinery, petroleum machinery, exploration machinery, etc. General specifications and dimensions of galvanized spiral welded pipe:

Material: Q195, Q215, Q235, Q345
Wall thickness: 0.8mm-18mm
Outer diameter: 1/2 inch - 8 inches (outer diameter 21.3 mm - outer diameter 219 mm)
Length: 1m-12m

The national standard allowable deviation of spiral steel pipe wall thickness is between ±0.2mm-0.6mm,
The deviation of the outer diameter of the galvanized pipe shall not be greater than ±0.15mm.
The length deviation of the galvanized pipe should not exceed 5mm.