What are the specifications and materials of spiral welded steel pipes?

Spiral welded steel pipe (SSAW) is a pipe material widely used in construction, transportation, water conservancy and other fields. Its main advantages include high strength, corrosion resistance, and strong pressure resistance. Below we will introduce the specifications and models of spiral steel pipes in detail. We need to understand the basic structure of spiral welded steel pipes, which are mainly welded by steel pipes and spiral seams. Spiral steel pipes come in different specifications and models based on different diameters and wall thicknesses.

1. Diameter specification
The diameter of spiral steel pipe generally ranges from DN20 to DN3000. Among them, DN means nominal diameter, that is, nominal diameter. It is slightly different from the actual diameter and is a value specified for ease of use.

2. Length specification

The length of spiral steel pipe is generally determined according to user needs. The standard length is generally 12 meters. Other lengths can also be customized according to customer requirements.

3. Wall thickness specifications
The wall thickness of spiral steel pipes varies according to different use occasions and stress requirements, and is generally between 2.5-10 mm. Differences in wall thickness also have an impact on pipe performance.

4. Connection method
The connection methods of spiral steel pipes mainly include welding, flange connection, socket connection, etc. Among them, welding is the most commonly used connection method, which can ensure the sealing and long-term use of the pipeline.

5. Surface treatment
In order to extend the service life of the pipeline, it is necessary to coat, galvanize and other treatments on the surface of the pipeline. Treated pipes can effectively prevent oxidation, corrosion and other problems.

Things to note when choosing spiral welded steel pipes:

When choosing spiral welded steel pipes, we need to pay attention to the following aspects:

1. Material
The material of spiral steel pipe directly affects its performance and service life. Common materials include Q235A, Q235B, 10#, Q235C, Q345(16Mn), L245(B), etc. Spiral steel pipes of different materials can be selected according to different use environments and requirements. When selecting, the appropriate material should be selected based on the specific needs and budget of the project.

2. Specifications and dimensions
Spiral steel pipes are available in a variety of specifications and sizes. When purchasing, appropriate specifications and sizes should be selected based on the specific requirements and design of the project. Common spiral steel pipe diameters are 219mm, 273mm, 325mm, etc., and the steel plate thickness range is 6mm-30mm. In addition, factors such as the length of the steel pipe and the form of the interface must also be considered.

3. Ensure quality supervision.
When purchasing spiral steel pipes, it is crucial to establish a strict quality supervision mechanism. Require suppliers to provide relevant quality certificates, such as warranty letters, inspection reports, etc. In addition, we can also negotiate with suppliers to conduct on-site sampling inspections of purchased products to ensure that product quality meets requirements.

4. Price and after-sales service
When considering the price of spiral steel pipes, the relationship between price and quality must be fully weighed. Choosing a price that is too low may mean that the product quality is not up to par, while a price that is too high may result in project cost overruns. Therefore, it is a wise choice to choose products with high cost performance within a reasonable price range. At the same time, it is also important to understand the supplier's after-sales service. Good after-sales service can solve product problems in time.