The difference between spiral steel pipe and seamless steel pipe

Spiral steel pipes and seamless steel pipes are relatively common pipes in life, and are used in house decoration and construction. So what is the difference between spiral steel pipe and seamless steel pipe? Then let's find out.

What is a spiral steel pipe?

Spiral steel pipe (SSAW) is a spiral seam steel pipe welded by automatic double-wire double-sided submerged arc welding process with strip steel coil as raw material, often extruded at high temperature. The spiral steel pipe sends the strip steel into the welded pipe unit, and after multi-roll rolling, the strip steel is gradually rolled up to form a round tube billet with an opening gap. Adjust the decrement of the squeeze roller to control the weld seam gap at 1~3mm, and make both ends of the weld joint flush. The appearance of the spiral pipe has spiral welding ribs, which is caused by its processing technology.

What is a seamless steel pipe?

Seamless steel pipe (SMLS) is a long strip of steel with a hollow section and no joints around it. It is made of steel ingot or solid tube billet by piercing, and then hot rolling, cold rolling or cold drawing. Pipelines are widely used to transport fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials.

Spiral steel pipe VS seamless steel pipe

The difference between spiral steel pipe and seamless steel pipe:

1. Different production methods

The seamless steel pipe is made by heating and punching the tube blank. It has no seams and the material needs to be determined on request. The spiral steel pipe is made by heating and rotating the strip steel once, and the material needs to be changed according to the needs. The problem that the seamless large-diameter pipe is not easy to manufacture is solved.

2. Different fields of application

Seamless steel pipes are generally used for high temperature and high pressure fluids, spiral steel pipes are generally used for fluids below 30 kg, and large diameter ones are used for medium and low pressure fluids. this
Seamless pipes are used in different places according to different production standards, mainly for industry. Spiral pipes are mainly used for low-pressure water delivery, heating and piling pipes, etc.

3. Different prices

Compared with seamless pipe, the price of spiral pipe is more economical.

Spiral pipes and seamless pipes are different in processing technology, outer surface and use. Both have pros and cons. Cost savings cannot be made without considering actual usage. You should choose the best one according to your actual situation.