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Its finish depends on type of sealing surface of
flanges (RF or RTJ) and it is clamped between pair of taping flanges.
Standard plates are made of 304 or 316 grade stainless steel, on
request of other materials. Plate can be supplied with so-called
drainage bore for gases, event. ventilation bore for other materials.
On the plate handle there are stamped main data – such as inside
diameter of piping, pressure class, material, bore diameter etc.
Diagram of orifice
plate with counterflanges unit in compliance with ASME B 16.36
Taping flanges in compliance with ANSI B 16.36 |
Packing of orifice plates in compliance with ANSI B 16.36 |
Taping flanges are made in compliance with
requirements given by ASME B 16.36 and are available in pressure
classes 300-2500 lb. Each unit of taping flanges is equipped by the
pair of pressure tapings, bolts, nuts, sealing and distance bolts (simplifying
plate take-out). Flanges are supplied with two tapings (1/2“NPT
thread), one with blinding for blow-off.
Usually these are „flange“ tapings, but corner pressure tapings are
possible as well.
Flanges are available in two various finishes of sealing surfaces:
RF or RTJ. Inner diameter (or „schedule“) of piping has to be
specified during the order.
Taping flange units can be supplied by rinsing rings which subsitute
plate during pipe rinsing succeeding its welding or other
technological interventions. Rinsing rings with the same inner
diameter of the piping prevent damage of a plate from scale residue
and other impurities. On request taping flange units with centric
orifice plate can be also supplied with direct piping sections of
the length 2D in front of and 2D behind the orifice plate.
If the centric orifice plate with flange pressure tapings is
calculated in compliance with ISO 5167 standard and the unit
contains of straight piping sections in length 2D in front of and 2D
behind the orifice plate, we are able to issue metrology approval in
compliance with TCM 142/1993-001 in our AMS K 65.
Dimension table and weights of orifice plate
with counterflanges unit in compliance with ASME B 16.36 for 400 Lb
pressure class
|
inch |
DN/PN |
J [mm] |
S [mm] |
mass [kg] |
| 4" Class 400 |
100/ |
254 |
95.3 |
37.2 |
| 6" Class 400 |
150/ |
317.5 |
109.5 |
61.7 |
| 8" Class 400 |
200/ |
381 |
123.7 |
96.6 |
| 10" Class 400 |
250/ |
444.5 |
130.3 |
140.2 |
| 12" Class 400 |
300/ |
520.7 |
143.0 |
194.6 |
| 14" Class 400 |
350/ |
584.2 |
155.7 |
251.3 |
| 16" Class 400 |
400/ |
647.7 |
158.8 |
319.8 |
| 18" Class 400 |
450/ |
711.2 |
171.5 |
391.5 |
| 20" Class 400 |
500/ |
774.7 |
174.5 |
483.5 |
| 24" Class 400 |
600/ |
914.4 |
181.1 |
705.3 |
Dimension table and weights of orifice plate
with counterflanges unit in compliance with ASME B 16.36 for 600 Lb
pressure class
|
inch |
DN/PN |
J [mm] |
S [mm] |
mass [kg] |
| 4" Class
600 |
100/ |
273.1 |
108.0 |
46.7 |
| 6" Class
600 |
150/ |
355.6 |
123.7 |
88.5 |
| 8" Class
600 |
200/ |
419.1 |
139.7 |
126.1 |
| 10" Class
600 |
250/ |
508 |
158.8 |
206 |
| 12" Class
600 |
300/ |
558.8 |
161.8 |
250.8 |
| 14" Class
600 |
350/ |
603.3 |
171.5 |
369.7 |
| 16" Class
600 |
400/ |
685.8 |
184.2 |
504.8 |
| 18" Class
600 |
450/ |
743 |
190.5 |
592.4 |
| 20" Class
600 |
500/ |
812.8 |
196.9 |
735.7 |
| 24" Class
600 |
600/ |
939.8 |
209.6 |
1052.3 |
Orifice plate unit in compliance with ANSI B 16.36 |
Orifice plate unit in compliance with ANSI B 16.36 |
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