Plate & blind flange NB 40 NP16.0 (Table 42) — IS 6392
Plate & blind flange NB 40 NP16.0 (Table 42) to IS 6392: outside dia 170 mm, bore / id (plate) 50.3 mm, thickness — plate rf 30 mm, thickness — blind rf 30 mm.
Dimensions of Plate & blind flange NB 40 NP16.0 (Table 42)
| Symbol | Dimension | Value |
|---|---|---|
| OD | Outside dia | 170 mm (6.693 in) |
| · | Bore / ID (plate) | 50.3 mm (1.980 in) |
| · | Thickness — plate RF | 30 mm (1.181 in) |
| · | Thickness — blind RF | 30 mm (1.181 in) |
| · | Teshi QC flag | STD~ID |
SKU TSH-FLANGE-IS-6392-NP16-0-TABLE-42-40 · Standard IS 6392 · Teshi master data
Purchase description
PLATE & BLIND FLANGE, NB 40, NP16.0 (TABLE 42), ASTM A105N, IS 6392
Available materials: ASTM A105N, ASTM A350 LF2 Cl 1, ASTM A182 F304/304L, ASTM A182 F316/316L, ASTM A182 F11 Cl 2, ASTM A182 F22 Cl 3, ASTM A182 F51 (Duplex), ASTM A182 F53 (Super Duplex), ASTM A694 F52 / F60, IS 2062 E250 (plate).
Notes
- PLATE FF thickness identical to PLATE thickness for every size; FF column omitted.
- BLIND FF thickness identical to BLIND thickness for every size; FF column omitted.
Same size, other ratings
NP0.6 (Table 5)NP1.0 (Table 11)NP1.6 (Table 17)NP10.0 (Table 38)NP2.5 (Table 23)NP4.0 (Table 28)NP6.4 (Table 34)
Other sizes — Plate & blind flange, NP16.0 (Table 42)
NB 10NB 15NB 20NB 25NB 32NB 50NB 65NB 80NB 100NB 125NB 150NB 175NB 200NB 250NB 300
Frequently asked questions
What are the main types of pipe flanges?
Weld neck (WN), slip-on (SO), blind (BL), socket weld (SW), threaded (THD), lap joint (LJ) and plate flanges. Special types include orifice, long weld neck, reducing flanges and spectacle blinds.
When should I use a weld neck flange instead of a slip-on?
Use weld neck flanges for high pressure, high or cycling temperature, and lines with vibration or fatigue loading. The tapered hub and full-penetration butt weld spread stress smoothly. Slip-on flanges are cheaper and easier to align, but their fatigue life is roughly one third of a WN.
What does Class 150, 300 or 600 mean on a flange?
The ASME class is a pressure-rating designation, not a pressure in psi. The allowable pressure depends on the material group and temperature. A Class 150 A105 flange is rated 19.6 bar at 38 °C but 13.8 bar at 200 °C.
Is a 150# flange rated for 150 psi?
No. A Class 150 carbon-steel flange is rated about 285 psi (19.6 bar) at ambient temperature, and about 170 psi (11.7 bar) at 260 °C. The "150" is a class number.