Expert in instrument piping valves, consultation on instrument connection and installation, help with difficult issues
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If there are any questions, we can discuss them together.
Save it – the standards for the models and dimensions of instrumentation piping are too varied
Yeah. There are national, American, and British standards for threads; some codes are unknown to me and their meanings are unclear, and even the young chief designers in design institutes may not be aware of them – they simply design according to the standard templates. There are also problems with the alignment of drawings, instruments, and processes in the design institute; the actual situation is not as described in the drawings. There are also pressure indicators, of all kinds.
Is there a needle-type stop valve that is movable at its tip?,, the one on the right side in the picture
Yes, there is. The valve tips of modern needle valves are basically movable. If needed, you can contact me via email: 1398821401@qq.com
Comparison items: Thread type, Standards followed, Thread angle, Unit for measuring pitch, Cross-sectional shape of thread crest and root, Taper, Sealing method, Symbol marking. Tapered threads: NPT threads (NPT), ASME B1.20.1, SAE AS71051; 60°, inches, Flat, 1:16, Thread sealant. 1/2-14NPT. ISO P-threaded pipes: Tapered threads (R, R1, R2, Rc, RT, PT, BSPT, ZG), ISO 7-1, EN 10226-1, BS 21, DIN 2999, JIS B0203; 55°, inches, Arc-shaped, 1:16, Thread sealant. R (Rc), 1/2, Straight threads. ISO P-threaded pipes: Parallel threads (G, PF, BSPP, RP), ISO 228-1, DIN ISO 228-1, JIS B0202, BS 2779; 55°, inches, Arc-shaped, / Gasket sealing. G, 1/2. SAE/MS threads (UN, UNJ), ASME B1.1, SAE J475, ISO R725; 60°, inches, Flat, / Gasket sealing. SAE 1/2-20. Metric threads (M), ISO 261; 60°, millimeters, Flat, / Gasket sealing. M20×1.5
Share some useful information. Thread Comparison: Comparison Items Thread Standard Followed Thread Angle Unit for Measuring Pitch Shape of Thread Top and Bottom Taper Sealing Method Symbol Marking Tapered Thread NPT Thread (NPT) ASME B1.20.1, SAE AS71051 60° Inch Flat 1:16 Thread Sealant 1/2-14NPT ISO P-Tapered Threads (R, R1, R2, Rc, RT, PT, BSPT, ZG) ISO 7-1, EN 10226-1, BS 21, DIN 2999, JIS B0203 55° Inch Circular Arc 1:16 Thread Sealant R (Rc) 1/2 Straight Thread ISO P-Parallel Threads (G, PF, BSPP, RP) ISO 228-1, DIN ISO 228-1, JIS B0202, BS 2779 55° Inch Circular Arc / Gasket Seal G 1/2 SAE/MS Threads (UN, UNJ) ASME B1.1, SAE J475, ISO R725 60° Inch Flat / Gasket Seal SAE 1/2-20 Metric Threads (M) ISO 261 60° Millimeters Flat / Gasket Seal M20×1.5
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