S Nomi is reckoned amongst the prominent in Orifice Welding Neck Flanges Manufacture in Kolkata, West Bengal, Bihar, Odisha, Jharkhand. ASME B16.36 flanges are orifice flanges and they are used for measuring the flow of fluid that has been transported through a pipeline, via a flow nozzle, that has been kept on the flange. 

Orifice Welding Neck Flanges can be obtained from Class #300 – Class #2500. Orifice Class #300 flanges are procurable in types such as weld neck end, slip-on and threaded. 

Orifice Class #600 and flanges above that Class, can be obtained in only weld neck type end. Orifice flanges of ASME B16.36 are produced in various grades and sizes. 

When the inspection of Orifice Welding Neck Flanges is being carried out, it is crucial to check for the length of the hub, bolt circle and bolt hole diameter, straightness and alignment of the bolt hole, thickness of weld end, outer and inner diameter of body and tap holes dimensions. 

Orifice flanges of ASME B16.36 are available in weld neck, threaded and socket weld, they are obtainable in different dimensions and they are also available in all ASTM forged grades (182, A350, A105 and A694). 

An Orifice Welding Neck Flanges union is 2 orifice flanges joined together. Orifice flanges are basically the same as slip on flanges or weld neck flanges, the differences being that stainless steel orifice flanges of ASME B16.36 have extra machining and another difference is that in the flange ring, orifice flanges have radial, tapped holes. 

This serves as the purpose of meter connections and so that additional bolts can serve as jack screws to allow for the separation of flanges, at the time of replacement or inspection of the orifice plate.

Standard Specification For Orifice Welding Neck Flanges

• Dimensions :ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
• Size :1/2″ (15 NB) to 48″ (1200NB)
• Class :150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
• DIN :DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636,DIN 2637, DIN 2638, DIN 2673
• BS : BS 4504 , BS 4504, BS 1560, BS 10
• PN :PN6, PN10, PN16, PN25, PN40
• Flanges Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Material & Grades of Orifice Welding Neck Flanges:

• Stainless Steel Orifice Flange : ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L Orifice Flange
• Duplex & Super Duplex Steel Orifice Flange : ASTM A182 / ASME SA182 F44, F 45, F51, F 53, F 55, F 60, F 61 Orifice Flange
• Carbon Steel Orifice Flange : ASTM A105 / ASME SA105 ASTM / ASME A 350 , ASTM A181 LF2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706 Orifice Flange
• Low Temperature Carbon Steel Orifice Flange: ASTM A350, LF2, LF3 Orifice Flange
• Alloy Steel Orifice Flange : ASTM A182 / ASME SA182 & A387 F1, F5, F9, F11, F12, F22, F91 Orifice Flange
• Copper Alloy Steel Orifice Flange : ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200
• Nickel Alloy Orifice Welding Neck Flanges: ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020) Orifice Flange