Is the butt-welded flange for DN800 of Series A or Series B? How can I tell?
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The butt-welded flange with a weld neck, DN800, CL300 (PN5.0), RF, JB 4726, 12Cr5Mo, SH/T 3406 – with a thickness of -15.88 mm – belongs to Series A or Series B? How can I tell? I would appreciate guidance from those who know more about this.
Bro, the pressure of 5.0 should indicate series A; check the SH/T 3406 standard for details. The simplest way is to measure the diameter of the connection pipe.
The class series does not have a b series; it only has an a series
Check the comparison between the corresponding outer diameter of the coupling and the H value of the A and B series flanges; the series that matches is the one to be used. Generally, for Series A or Series B, it should be specified in the standard or model.
:lol:lol, I use this method in my daily life as well – it always works. :handshake:handshake:handshake
CL300(PN5.0) RF JB 4726 12Cr5Mo SH/T 3406 – Doesn’t CL300 simply mean 300 pounds? SH/T 3406-2013: Steel pipe flanges for petrochemical industries – this standard does not cover pipes with metric outer diameters. But this marking of yours is not exactly the standard method of marking. It refers to the wall thickness. SHT 3406-2013: For steel pipe flanges used in the petrochemical industry, SCH is used as the designation. However, petrochemical standards generally use imperial-sized pipes.
The original poster is at odds with Series A and Series B: lol
The PN series has A/B distinctions, while the CLASS series does not.
The 3406 standard also makes a distinction between Series A and B!
Sometimes it’s really not laziness: lol,