Process pipeline grade

Pipes are generally classified according to their pressure rating. The various pipe rating categories you listed are the codes specified for your project; it seems that the material used is the same in all cases. For more details, you can check the pipe rating table for that project or the unified design specifications

I. Long-distance pipelines are classified as GA category, with the following grades: 1. Long-distance pipelines that meet one of the following conditions are classified as GAl grade: (1) Pipelines that transport toxic, flammable, or explosive gas media and have a design pressure of P > 1.6 MPa； (2) Pipelines that transport toxic, flammable, or explosive liquid fluids, with a transmission distance (defined as the direct distance between the source, storage facility, and user via the pipelines used for transporting such fluids) of ≥ 200 km and a nominal pipe diameter of DN ≥ 300 mm ； (3) Pipelines for transporting slurry media, with a transmission distance of ≥50 km and a nominal pipe diameter of DN≥150 mm. 2. Long-distance pipelines that meet one of the following conditions are classified as GA2 grade. (1) Pipelines for transporting toxic, flammable, and explosive gas media with a design pressure of P≤1.6 PMa ； (2) Pipes outside the GAl(2) range ； (3) Pipelines outside the GAl(3) range. II. Public pipelines fall into the GB category, with the following grade classifications: GBl: gas pipelines ； GB2: Thermal pipelines. III. Industrial pipelines are classified as GC category, with the following grading: 1. Industrial pipelines that meet one of the following conditions are classified as GC1 grade: (1) Pipelines that transport media with an extreme hazard level as specified in GB5044 \"Classification of Hazards from Occupational Exposure to Toxic Substances\" ； (2) Pipelines that transport flammable gases of Class A or B, or flammable liquids of Class A, as specified in GB50160 \"Code for Fire Protection Design of Petrochemical Enterprises\" and GBJ16 \"Code for Fire Protection Design of Buildings\", and whose design pressure is P≥4.0 MPa ； (3) Pipelines for transporting flammable fluid media or toxic fluid media, with a design pressure of P ≥ 4.0 MPa and a design temperature of ≥ 400°C ； (4) Pipelines that transport fluid media and have a design pressure of P ≥ 10.0 MPa. 2. Industrial pipelines that meet one of the following conditions are classified as GC2 grade: (1) Pipelines that transport flammable gases of Class A or B, or flammable liquids of Class A, as specified in GB50160 \"Code for Fire Protection Design of Petrochemical Enterprises\" and GBJ16 \"Code for Fire Protection Design of Buildings\", and whose design pressure is P＜4.0MPa ； (2) Pipelines for transporting flammable fluid media or toxic fluid media, with a design pressure of P < 4.0 MPa and a design temperature of ≥ 400°C ； (3) Pipelines for transporting non-flammable fluid media and non-toxic fluid media, with a design pressure of P < 10 MPa and a design temperature of ≥ 400°C ； (4) Pipelines for transporting fluid media, with a design pressure of P < 10 MPa and a design temperature of < 400°C. 3. GC2-class pipelines that meet one of the following conditions are classified as GC3-class: (1) Pipelines transporting flammable fluid media or toxic fluid media, with a design pressure of P < 1.0 MPa and a design temperature of < 400°C ； (2) Pipelines for transporting non-flammable fluid media and non-toxic fluid media, with a design pressure of P < 4.0 MPa and a design temperature of < 400°C.

PN16 carbon steel pipe, flange face-to-face connection. The last digit is a sequence number; it is used to distinguish between different pipelines and components resulting from variations in medium or temperature.

It’s specified in the project guidelines, and it’s also shown in the homepage image! !

Based on experience, in B2RF1, B2RF2, and B2RF3, the letter B denotes: material type； 2 indicates: pressure rating ； RF denotes the type of flange sealing surface ； The final 1, 2, 3 are for more detailed classification. The specific meaning depends on the engineering specifications.

Reply to 1# Ivory: Check the project’s pipe material grade specifications

B2RF1 B2RF2 B2RF3 B: Indicates the material type, usually referring to carbon steel. 2: Indicates the pressure rating, PN16. RF: Indicates the type of flange sealing surface； The final 1, 2, 3 refer to the pressure elements, in the form of gaskets; the requirements vary depending on the type of pipe, so it depends on the specific project

The design institute should provide you with a table detailing the pipe grades; take a look and you’ll understand

Each material specialty will issue a set of unified regulations for materials, which will contain relevant explanations; please refer to the unified regulations for pipeline materials issued by the pipeline material specialty in question.