ASME B16.5 is a kind of American standard applied for stainless steel Welding Neck flanges production. It belongs to the standards of pipes and pipe spare parts and short for American Society of Mechanical Engineers (ASME). ASME B16.5 makes it clear on the requirements of dimension, material, pressure rate and temperature of Welding Neck flanges.

ASTM A350 LF2 is a common low-temperature carbon steel material, mainly used to manufacture low-temperature high-pressure forged pipe fittings and flanges.Blind flanges are generally non-porous in the middle, serving as a barrier and cutoff. Due to their good ASTM A350 LF2 is a common low-temperature carbon steel material, mainly used to manufacture low-temperature high-pressure forged pipe fittings and flanges.Blind flanges are generally non-porous in the middle, serving as a barrier and cutoff. Due to their good sealing performance, they are a reliable sealing means for pipeline systems.

ASTM A403 butt weld pipe fittings is made by stainless steels with austenitic structure at room temperature. Steady austenite structure exists in steels containing about 18% Cr, 8%~25% Ni and 0.1% C.

Ring-Joint Facing is a common kind of flange sealing surface. Ring-joint facing flange, also a narrow flange, has a ring trapezoid cut out on the protruding surface of the flange as the flange sealing surface. This flange must be separated axially during installation and removal. The ring-joint facing is specially designed to fit with metal gaskets with octagonal or circular shape processed by metal materials. It also has low installation requirements and is suitable for high temperature and pressure situations. However, the machining precision of sealing surface is high. Ring-joint facing is mainly used on butt-welded flange with neck and integral flange, and the applicable pressure range is 6.3MPa-25.0MPa.

Galvanized pipe and stainless steel pipe are commonly used pipes. Galvanized pipes are coated with zinc to achieve corrosion resistance. Stainless steel pipe is added with antioxidant metal elements to greatly resist corrosion. Different steels will work better depending on the application they are used in. There are many factors to consider when selecting galvanized steel pipes or stainless steel pipes. At the same time, we need to understand the basic knowledge of galvanized steel pipes and stainless steel pipes. Stainless steel pipes and galvanized steel pipes are often mixed.

EN 10241 was developed by the European Standards Union. This European standard specifies requirements for threaded fittings of nominal sizes from DN 6 to DN 150 inclusive, made out of welded or seamless steel tubes, forging and rolled bars. It is applicable to those threaded steel pipe fittings that are used in the transportation and distribution of liquid or gas.