FAQ

Differences of ASTM A53 B and ASTM A106 B. ASTM A53 B covers ERW, Seamless and Galvanized steel pipe. A106 B covers only seamless steel pipe for high temperature service.

The differences between LSAW pipe and SSAW pipe. LSAW pipe welding in longitudinal, SSAW pipe welding in spiral, LSAW quality is better than SSAW.

ERW pipe manufacturing process includes HFW. ERW have low, medium, high frequency welding processes, and HFW is specially for high-frequency electric resistance welding. The differences between ERW and HFW steel pipe, is EFW is a type of ERW process for ordinary and thin-wall thickness steel pipes. ERW pipe: Electric Resistance Welded Pipe HFW pipe: High […]

Differences between 3PE and FBE. 3PE coated steel pipe have 3 layers of FBE, corrosive, and PE layers, it has integrated advantages of FBE and PE.

API 5L line pipe (Seamless and welded pipe) of all grades have PSL1 and PSL2 two product specifications, they are different on chemical composition, manufacturing processes, mechanical strength, heat treatment, test records, traceability etc. Line pipes in API 5L PSL2 is higher than PSL1 a. PSL is the short name of product standard level. The product […]

What is API 11B Steel Sucker Rod Steel sucker rod is a kind of long slender bar used in pumping well, common standard is API SPEC 11B (Specification for sucker rods, polished rods and liners, couplings, sinker bars, polished rod clamps, stuffing boxes, and pumping tees). It connects with polished bar above, and pumps at […]

What is galvanized steel pipe? Galvanized steel pipe is the carbon steel pipe that are coated with a protective layer of zinc. The zinc layer served as a sacrificial layer, it will get rust before the carbon steel under neath it. Galvanized steel pipe include Two types: hot dipped galvanized steel pipe and cold galvanized […]

The fire protection pipe and connection fittings are mainly used to connect firefighting equipment, conveying fire fighting water and so on. It is also called fire sprinkler pipe and fittings. Due to the special requirements, the thickness and material of the fire protection pipe and fittings have special requirements. According to the regulations, the fire […]

API 5CT N80-1, N80Q differences for Casing pipe and Tubing on the impact strength, heat treatment and Non-Destructive test. N80Q is higher than N80-1.

Heat treatment methods for carbon and alloy steel pipe includes normalizing, annealing, tempering, quenching. It will improve the material performances.

The differences between the seamless steel pipe and welded steel pipe, on performances, manufacturing processes, applications, sizes.

BS EN 10204:2004 is British Standard that related to different types of inspection documents for steel metal products. There are 4 types for EN 102024, 2.1, 2.2, 3.1 and 3.2, the later two types are the mostly used in steel pipe and plates products, so here we will mainly introduce the major differences between two […]