Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question dated 2020-08-24
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Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question from 2020-08-24: Discussion question: 214. Please list the specifications of commonly used instrument wiring tubes
Commonly used are 1/2, 3/4 galvanized steel pipes and PVC pipes.
Common PVC wire conduit specifications: 1. Classified by the temperature rating of the wires into types such as 225, 05, 90/-25, etc. 2. Classified by PVC wire type, they include rigid pipes, 1653 semi-rigid pipes, and corrugated pipes. 3. Classified by wire characteristics into light, medium, heavy, and extra-heavy types. 4. The nominal outer diameter specifications for PVC wire conduits are: Φ16, Φ20, Φ25, Φ32, Φ40, Φ50, Φ63, Φ75, Φ110. Among them, the PVC wire pipes come in sizes of Φ16 and Φ20, and are generally used for indoor lighting circuits ； The outer diameter of PVC wire conduits is Φ25, and they are commonly used for sockets or indoor main wiring conduits ； The outer diameter specification for PVC wire conduits is Φ32; they are commonly used for conduits in household wiring, as well as for weak current wiring ； PVC wire conduits with outer diameters of Φ50, Φ63, and Φ75 are commonly used for conduits running from electrical panels to indoor areas.
Commonly used are 1/2, 3/4 galvanized steel pipes and PVC pipes.
Commonly used diameters (outer diameter) are 16 mm, 20 mm, 25 mm, 32 mm, 40 mm, 50 mm, and 63 mm.
Galvanized water gas pipe, Q235B, DN15, DN20, DN25, DN32, etc
Commonly used are 1/2, 3/4 galvanized steel pipes and PVC pipes.
Commonly used are 1/2, 3/4 galvanized steel pipes and PVC pipes
Commonly used are 1/2, 3/4 galvanized steel pipes and PVC pipes.
Commonly used diameters (outer diameter) are 16 mm, 20 mm, 25 mm, 32 mm, 40 mm, 50 mm, and 63 mm.
DN15 DN20 DN25 DN40 DN50