Issues with flange specifications?

2017-09-05View Original

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There is a flange that meets the ASME 16.5 standard, 3\" FL.WN.RF CLASS 150. What does FL mean in this context? Could you also explain the others in detail? I couldn’t find any standards. There is also a standard, HG/T 20592-2009, specifying PL1200(A)-1.0 RF. I noticed that the pressure value of 1.0 specified in this standard applies only to diameters of 600 and 1200 – what’s the reason for that?

Reply #22017-09-06

FL refers to flange connection; for PL, the plate-type butt weld flange of grade 1.0 is indeed available only up to DN600, while the necked butt weld flange of grade 1.0MPa can be used up to DN1200

Reply #32017-09-06

FL=Flange DN1200 PN1.0; refer to EN DIN1092-1 or ISO7005-1

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Issues with flange specifications?

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