Stainless steel seamless steel pipes are widely used in high-pressure, low-temperature and corrosion-resistant environment piping systems. Mechanical properties, process properties and corrosion resistance are three important indicators to measure the quality of steel pipes, and are also important guarantees for safe navigation of ships. So how to avoid surface quality problems?

The insulation pipe is mainly composed of three layers, one layer is a protective shell made of high-density polyethylene or fiberglass, one layer is an insulation layer made of rigid polyurethane foam, and a layer of working steel pipes, which can be transported according to the medium. Welded steel pipes, seamless steel pipes, and double-sided submerged arc spiral steel pipes are used for different requirements.

In order to prevent seamless pipes or welded steel pipes from corroding and prolong their service life, seamless pipes and welded pipes are usually galvanized. Galvanized seamless pipes are divided into cold-galvanized seamless pipes and hot-dip seamless pipes. The former has been banned, and the latter is still recommended to be used temporarily. So what are the steps to master when installing?

Aging treatment refers to the heat treatment process in which the seamless steel pipe is subjected to solution treatment, quenched at high temperature or subjected to a certain degree of cold working deformation, and placed at a higher temperature or room temperature to maintain its shape, size, and performance over time.

Rectangular tubes (such as a500 square tube and a500 rectangular tube) are a name for square tubes and rectangular tubes, that is, steel tubes with equal and unequal side lengths. It is made of strip steel after process treatment. Generally, the strip steel is unpacked, flattened, crimped, welded to form a round tube, and then rolled into a square tube from the round tube and then cut to the required length.

Welded steel pipe is a steel pipe made of steel plate or strip steel after being crimped and welded, generally with a length of 6 meters. The production process of welded steel pipe is simple, the production efficiency is high, there are many varieties and specifications, and the investment in equipment is small, but the general strength is lower than that of seamless steel pipe.