Currently Empty: ₨ 0
Condition : Brand New / Reconditioned (Job lot)
M.O.Q : 1 Pair
Color : Black
Class : 150 class , 300 class , 600 Class , Etc
100 in stock
Delivery & Returns
Delivery & Returns
Delivery all over Pakistan
We deliver to your door anywhere in Pakistan, including factories, workshops and project sites. Delivery usually takes 15 to 30 days, depending on your city and whether the item is in stock or imported to order. We’ll confirm the expected time when you place your order.Wrong, damaged or faulty item?
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Ordering & Payment
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Ask us on WhatsApp for detailed photos or videos of the actual item before you buy.Description
20″ Weld Neck Class 150 Flange Dimension Chart :
A CS Weld Neck Flange (WNF) is a heavy-duty piping component designed to be butt-welded directly to a 20 nominal pipe size (NPS) pipe. The long tapered hub provides stress distribution from the flange to the pipe, making it ideal for high-pressure, high-temperature, or cyclic loading applications.
All standard dimensions of CS Weld Neck Flange are below conform to ASME B16.5 (dimensions are given in both inches and millimeters for convenience):
| Feature / Dimension | Value (Inches) | Value (Metric / mm) |
| Nominal Pipe Size (NPS) | 20″ | 500 mm |
| Outside Diameter (O.D.) | 27.50″ | 700.0 mm |
| Flange Thickness (minimum) | 1.69″ | 42.9 mm |
| Length Through Hub (Y) | 5.69″ | 144.5 mm |
| Diameter of Hub at Base (X) | 22.00″ | 558.8 mm |
| Diameter of Weld Neck (Bevel End) | 20.00″ | 508.0 mm |
| Raised Face Diameter (R.F.) | 25.00″ | 635.0 mm |
| Raised Face Height | 0.06″ | 1.6 mm |
| Approximate Weight | ~185 lbs | ~84 kg |
Drilling & Bolting Specifications
To install and secure a 20″ Class 150 flange, the following drilling template is utilized:
Bolt Circle Diameter (PCD): 25.00″ (635.0 mm)
Number of Bolt Holes: 20
Diameter of Bolt Holes: 1.25″ (31.8 mm)
Diameter of Bolts/Studs: 1-1/8″
Stud Bolt Length (with 1/16″ Raised Face): 6.75″ (171.5 mm)
