Requirements of RTRP Piping Design and its Advantages
This article talks in detail about RTRP piping. It covers the introduction part, advantages, manufacturing, different pipe joining systems, different performance tests and standards determining it
RTRP (Reinforced Thermosetting Resin Pipe) is a non-metallic piping system widely used in process industries for various applications. FRP, GRP, GRE, RTP, RTPR and GRV are different abbreviations for specific types of RTR pipes based on the resin systems used in the manufacturing of the piping system. It comprises thermosetting plastic resins, glass-fiber reinforcements & addictive. RTRP establishes strength from the fiberglass reinforcement and corrosion resistance property from the resin.
The usage of reinforced thermosetting resin pressure piping has increased significantly in chemical plants, oil & gas facilities, water and sewage system. It is because of its corrosion resistance, strength & durability features.
RTRP Piping Advantages
There are three different types of manufacturing processes as follows:
Filament Winding Process: ASTM D2996 covers RTRP pipe manufactured by the filament winding process up to 24 inches. Then the glass fiber roving or roving tape is wetted through resin and wrapped in a particular pattern until the required structural thickness is obtained. The recommended angle for winding angle is 54º ± 2°. It provides optimum axial and hoop strength to the RTR pipe. This method of manufacturing results in a higher glass fiber to resin ratio and lower wall thickness. The internal diameter of the pipe remains fixed while the external diameter varies with the wall thickness of the pipe. The filament winding process provides higher tensile strength and a uniform glass pattern. However, for corrosion-resistant applications which require a resin-rich (90% +) inner layer, fabrication generally starts through the hand lay-up process.
Centrifugal Casting Process: The ASTM D2997 specification covers machine-made glass-fiber-reinforced thermosetting-resin pressure pipe manufactured by the centrifugal casting process. In this process, the resin and glass fiber reinforcement is applied to the internal side of a mold so the outside diameter remains constant. And the inside pipe diameter changes as per the wall thickness of the reinforcement. It provides the most consistent mechanical properties and close tolerance on dimensions.
Different types of RTRP Piping Joining Systems
RTRP Performance Qualification Testing
RTRP Piping Applicable Standards
Let’s have a look at the comprehensive list of standards applicable to the design, manufacturing, inspection & testing of fiberglass piping.
ISO 14692-1: Glass-reinforced plastics (GRP) piping for petroleum and natural gas industries – Part 1: Vocabulary, symbols, applications and materials
Hence, the list mentioned above of piping standards helps to reduce significant costs by providing optimum piping design. If you’re looking for piping design and engineering services for your next project, consider outsourcing a reliable team having an in-depth understanding of modern piping design industry codes and standards.
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ABOUT THE AUTHOR
Judith Morrison is an expert in the field of industrial engineering and writes articles related to piping, civil, equipment engineering related articles.