Alloy Steel Orifice Flanges Manufacturers

ASME B16.5 Orifice Flanges Specification :

Standard : 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.

Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

BS : BS4504 , BS4504, BS1560, BS10

DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673

ANSI B16.47 Orifice Flanges Material & Grades:

Alloy Steel Orifice Flanges : ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91

All Classes Dimensions of Orifice Plate Flanges

Tolerances

Notes:

1. Marking
   The Upstream side of the orifice tab shall be stamped at the indicated locations with:
   - the word UPSTREAM
   - the Tag Number
   - the ASME flange class, followed by RF
   - the nominal pipe size (NPS)
   - the measured orifice D1 (in mm)
   - the material of the orifice plate
   - the type of orifice plate (Square, Restriction etc.)
   Letter height approx. 4 mm
2. Welding of tab
   Tab may be integral with orifice plate up to and including 7 mm plate thickness.
   In other cases full penetration joint to be applied.
3. Finish of plate
   The upstream and downstream faces of the orifice plate to a diameter equal to D3 shall have a surface roughness Ra ≤ 0.8 µm ASME B46.1.
   The remaining annular part (between D4 & D3) of upstream and downstream faces shall have a surface roughness Ra between 3.2 and 3.6 µm ASME B46.1. This finish shall be obtained by machining with a round nosed cutting tool having a 0.8 mm radius at a feed rate between 0.35 and 0.45 mm per revolution.
4. Concentricity
   The centre of the orifice shall not differ from the centre of the plate by more than 0.1 mm for ≤ NPS 8 and 0.2 mm for > NPS 8.
5. Finish of throat
   The throat and outlet cone shall have a surface roughness Ra ≤ 0.4 µm ASME B46.1.
   All edges shall be sharp and free from burrs, so that when viewed with the naked eye no light is reflected by the corners.
6. Plate thickness
   The difference between any two measurements of plate thickness, for annular part D1-D3, shall not differ by more than 0.001 DN in mm.
   The plate shall not depart from flatness along any diameter by more than 0.01 D3.
   Tolerance for N shall be:
   N ≤ 6 mm +0.1/-0.25 mm
   N > 6 mm +0/-1.5 mm
   Thickness for annular part D3-D4, may be slightly less, max 0.05 mm, due to surface finishing difference between D1-D3 & D3-D4. (see note 3)

General notes:

Other Related Products:

• ANSI B16.47 Slip on Flanges
• ANSI B16.47 orifice Flanges
• ANSI B16.5 Blind Flanges
• ASME 16.5 Socket Weld Flanges
• ASME 16.5 Ring Type Joint Flanges
• ANSI 16.5 Spectacle Blind Flanges
• ANSI 16.5 Screwed Threaded Flanges
• ANSI 16.5 Groove and Tongue Flanges
• ANSI 16.5 Lap Joint Flanges
• ANSI 16.5 Square Flanges
• SS JIS B220 Flanges
• ASME 16.5 API6A Blind Flanges

We Supply Orifice Flanges For Various Application Industry Like :

Oil & Gas Industries

Petrochemical Industries

Engineering Industries

Chemical Industries

Sugar Industries

Power Generation Industries

Fertilizers Industries

Food Processing Industries

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