When brown rust spots appear on the surface of stainless steel pipes, people are often surprised, thinking, "Stainless steel doesn't rust; if it rusts, it's not stainless steel, and there might be a problem with the steel quality."

According to the technical requirements of various international and industry standards, carbon steel plates and their machined parts must be protected against corrosion during storage to prevent degradation of metal properties and even slow crack propagation and potential fracture risks.

ASTM A240 316/316L stainless steel plate is a high-performance material widely used in industries requiring excellent corrosion resistance, strength and workability. This specification covers flat-rolled plates manufactured to the ASTM A240 / ASME SA240 standard for stainless steel grade 316 and its low-carbon variant 316L.

OCTG, or well tubing, plays a crucial role in the extremely harsh environments of oil and gas extraction. These steel pipes, including casing, tubing, and drill pipe, are highly specialized, capable of withstanding immense pressure, temperature variations, and corrosive environments.

Galvanized square tube is a hollow square-section steel pipe made from hot-rolled or cold-rolled galvanized strip steel or galvanized coil as raw material, cold-bent and then high-frequency welded. Alternatively, it can be made by hot-dip galvanizing pre-formed cold-bent hollow steel pipes.

SCH 20 CS Seamless Pipe refers to a carbon steel seamless pipe manufactured according to the Schedule 20 wall thickness standard. Due to its thin-walled structure, good mechanical properties, and wide applicability, this type of pipe is widely used in water, gas, and light-duty industrial transportation systems.