When it comes to fire suppression equipment like sprinkler systems and water supply pipes for fire hydrants Or oil and gas transmission pipelines,choosing the right steel is crucial.

Not only do you need to have pipes with the right volume to carry sufficient water, gas, or other firefighting substance, but they must be strong enough to withstand corrosion, high temperatures, and high pressure.

The properties of steel make it an excellent choice for use in your fire suppression systems. In this article, we’ll look at the standards that govern fire protection pipes, as well as the several applications for these pipes.

Standards for fire protection pipes are governed by ASTM International, a standards organization that publishes technical requirements for a broad range of services and materials. Formerly known as the American Society for Testing and Materials, they develop and publish standards that have been widely agreed upon for various uses.

For fire protection pipes, there are three standards:

ASTM A53：The broadest standard for fire pipe, ASTM A53 pipes generally come in three thicknesses: Standard (Schedule 40)、Extra strong (Schedule 80)、Double extra strong (Schedule 160)
When it comes to pipe thickness, the lower the Schedule number, the thinner the pipe. ASTM A53 requires that Schedule 40 be used as a minimum for sprinkler systems, although there are no restrictions against using the heavier pipes.

ASTM A135：This standard covers electric resistance welded pipe. This fabrication process allows lines to have thinner walls while reducing the potential for corrosion. These pipes are required to be at least Schedule 10.

ASTM A795： Refers to pipes that can be used in sprinkler systems. The walls of these pipes are generally between Schedule 10 and Schedule 40.

All three of these pipe types must be either painted red or coated in a red polymer epoxy. They can also come in either black steel or hot-dipped galvanized, which helps reduce corrosion.

DEZHENG STEEL  has always been able to gain the recognition of our customers by the high quality of our products and services.
We have about 400 employees and 25 production lines, many processing lines and 2 laboratories with advanced technology now. Our annual capacity is approximately  1000000 tons and exports of 200,000 MT per year to South and North America, Europe, the Middle East, Africa, Australia and Southeast Asia.

If you click on the certificate page, you will find all of our products have the corresponding standard certificates, and it costs a high amount of money to maintain these certificates every year, and we are still insisting on applying for more certifications, in order to deliver the best products to our customers.

In addition, we will strictly control the product quality during the inspection process. Before each shipment to customers, DEZHENG’s quality inspection and sales staff in charge of your order will double check and test the product to ensure the quality of the goods.

Seamless steel pipe is manufactured by the round steel billet, through hot rolling, cold rolling or cold drawn processes, no seam on the pipe body.
Welded steel pipe is manufactured by flat steel plate, with welding seam on the pipe body.

API 5L and ASTM Seamless steel pipe adopts steel ingot or solid tube as raw material through the perforated tube, then can be formed by hot rolled, cold rolled or cold drawn. Hot rolled seamless steel pipe is formed by billet forging, perforation, rolling, shaping and other processes. For Large diameter pipe, and thick walled seamless pipe usually made in this way. Cold drawn seamless pipe used cold-drawn forming technology. The material strength is relatively low, the appearance and internal control surface is smooth. Small diameter and thin wall seamless pipe usually made in this way. The seamless steel pipes are rolled by carbon structural steel, low alloy structure steel or alloy structure steel and stainless steel. Seamless steel pipes applied in different industries: Line pipe for pipelines, thermal services, mechanical industries, chemicals etc.

API 5L or ASTM welded steel pipe includes LSAW pipe, SSAW pipe, and ERW steel pipe. These pipes are made with steel strip or steel plate. The manufacturing processes first bending the steel plate, then welded into circular, square and other shapes. Welded steel pipe has the characteristics of high production efficiency, low cost and saving material. It has been widely applied to aviation, aerospace, energy, electronics, automobile, light industry and other industries. With strong corrosion resistance in the acidic environment.