I would like to ask about the meaning of some letters in the drawings from Hualu Design Institute

In the drawings from Hualu Design Institute, the notation “weldolet A350 Gr LF2 CL 1 BW SCH80 XS MSS SP-97” – the part “XS MSS SP-97” indicates that XS is a classification for the pipe wall thickness, referring to extra-thick-walled pipes (Extra Strong)； MSS: The full name is Manufacturers Standardization Society of the Valve and Fittings Industry, which is the Standardization Association for Valve and Fitting Manufacturers in the United States ； SP-97: MSS SP-97 is a standard specification developed by MSS; it covers the manufacturing standards for various types of pipe fittings, such as steel forged joints and flanged joints. The MSS SP-97 standard applies to the production and supply of forgings factories. It is mainly divided into the following three parts: 1. Insert-type (butt-welded) forged pressure-reducing sleeves and sleeve joints ； 2. Insert-type (butt-welded) forged pipe fittings, flanges, and valve accessories ； 3. Dimension standards, tolerances, quality, packaging, marking, and acceptance. In general, “weldolet A350 Gr LF2 CL 1 BW SCH80 XS MSS SP-97” refers to a steel-cast fitting that complies with the MSS SP-97 standard established by MSS. The material of this joint is A350 Gr LF2 CL 1; the connection method is welding (BW), the wall thickness is SCH80, and it is an extra-thick-walled pipe (XS). .

The pipe and material lists are available in the design institute.

The pipeline material list is available in Hualu Design Institute’s documents. Any petrochemical project will provide it.