Dimensions, Classes, Tapped Holes, Pressure Ratings
ASME B16.36 Standard Flanges: Dimensions | Specifications | Material Grade | Standards | About ANSI B16.36 | All Product Types
The ASME B16.36 flange standard defines the dimensional and pressure requirements for flanges used with orifice meters, specifically those with tapped holes for pressure measurement. This standard complements ASME B16.5 and is applicable to steel pipe flanges from NPS 1″ to NPS 24″ (DN25 to DN600) in pressure classes 300, 400, 600, and 900.
Unlike regular flanges, B16.36 flanges are designed with precisely located radial tapped holes to accommodate orifice plates and pressure taps, enabling accurate differential pressure measurement in flow systems. The standard covers both Raised Face (RF) and Ring Type Joint (RTJ) facings, along with details on jack screw holes, drilling templates, gasket seating surfaces, and dimensional tolerances.
At Nutech, we supply ASME B16.36 flanges manufactured to strict quality standards, ensuring compatibility with global projects across oil & gas, chemical, refining, power generation, and water treatment sectors. Whether it's a carbon steel tapped flange, a stainless steel pressure-rated flange, or a custom-machined B16.36 face, our components are tested for dimensional accuracy and pressure integrity as per industry norms.
We offer full documentation support including EN 10204 3.1/3.2, NACE compliance, and IBR (where applicable), with exports to countries like UAE, Saudi Arabia, Qatar, Germany, South Africa, Singapore, and the USA.
For complete technical details, including dimensions, pressure rating classes, weight charts, sizes, tolerances, and material specifications of our ANSI B16.36 Standard Flanges, please download the full Catalog PDF below.
Specification | Details |
---|---|
Standard | ASME B16.36 – Orifice Flanges with Tapped Holes for Pressure Measurement |
Size Range | 1″ NB to 24″ NB (DN25 to DN600) |
Pressure Ratings | Class 300, 400, 600, and 900 |
Face Types | Raised Face (RF), Ring Type Joint (RTJ) |
Tapped Hole Position | Precisely machined radial tapped holes located 90° apart for differential pressure connections |
Jack Screw Holes | Provided for easy separation of flange connection during maintenance or inspection |
Drilling Template | Matches ASME B16.5 bolt-hole patterns for equivalent pressure class |
Gasket Compatibility | Spiral Wound, Metal Jacketed, RTJ Gaskets as per ASME B16.20 |
Surface Finish | Stock Finish, Smooth, Spiral Serrated as per ASME B16.5 guidelines |
Compliance | Meets ASME B16.36 dimensional tolerances and testing requirements |
Testing & Inspection | Hydro Test, PMI, Dimensional Inspection, Visual QC (as required) |
Documentation | EN 10204 3.1 / 3.2, NACE MR0175, ISO 9001, PED 2014/68/EU |
Application Industries | Oil & Gas, Petrochemical, Power Generation, Water Treatment, Food & Beverage, Fire Protection Systems, Pulp & Paper, Shipbuilding, HVAC, Offshore |
Origin | Made in India (by Nutech Overseas) |
Export Network | USA, Europe, and Middle East |
Material Category | B16.36 Flange Grades |
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Stainless Steel B16.36 Flange | ASTM A182 F304 / F304L / F304H, F316 / F316L / F316Ti, F310, F309S, F317 / F317L, F321 / F321H, F347 / F347H, F904L, ASTM A351 CF3 / CF3M / CF8 / CF8M / CF8C, DIN 1.4301, 1.4306, 1.4307, 1.4311, 1.4401, 1.4404, 1.4408, 1.4409, 1.4541, 1.4571, 1.4550, 1.4435, 1.4539 |
Duplex Steel B16.36 Flange | ASTM A182 F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61, UNS S31803 / S32205 |
Super Duplex Steel B16.36 Flange | ASTM A182 F53 / F55 / F57 / F59 / F60 / F61, UNS S32750 / S32760 |
Carbon Steel B16.36 Flange | ASTM A105 / A105N, ASTM A350 LF2, ASTM A694 F52 / F56 / F60 / F65 / F70 / F80, ASTM A216 WCB, DIN 1.0460 / 1.0402 / 1.0619, Die Steel, Mild Steel |
Alloy Steel B16.36 Flange | ASTM A182 F5 / F9 / F11 / F12 / F22 / F91, AISI 4130 / 4140 |
Nickel Alloy B16.36 Flange | Nickel 200 / 201, ASTM B564 |
Monel B16.36 Flange | Monel 400 (UNS N04400), Monel K500 (UNS N05500), ASTM B564 |
Inconel B16.36 Flange | Inconel 600 / 601 / 625 / 690 / 718 / 783 / X750, ASTM B564 |
Incoloy B16.36 Flange | Incoloy 800 / 800H / 800HT (UNS N08800), Incoloy 825 (UNS N08825), Incoloy 925, ASTM B564 |
Hastelloy B16.36 Flange | Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X, ASTM B564 |
Alloy 20 B16.36 Flange | Alloy 20 / 20Cb-3, Carpenter® 20, ASTM B462 |
254 SMO B16.36 Flange | SMO 254 / 6Mo, UNS S31254, DIN 1.4547, ASTM A182 |
Copper Nickel B16.36 Flange | Copper Nickel 90/10 (C70600), 70/30 (C71500), UNS C71640, ASTM B61 / B62 / B151 / B152 |
Copper B16.36 Flange | TP1, TP2, T1, T2, C10100–C12300, C14200–C17200, C21000–C71520, including C10930, C11000, C11400, C12000, C12200, C26000, C28000, C33000, C44300, C70600, etc. |
Brass B16.36 Flange | Grades 3602, 2604, H59, H62, etc. |
Aluminium B16.36 Flange | Aluminium Grades 5052, 6061, 6063, 2017, 7075, etc. |
Titanium B16.36 Flange | ASTM B381 Gr.1 / Gr.2 / Gr.4 / Gr.5 / Gr.7, UNS R50250 / R50400 / R50550 / R50700 / R52400 / R53400 / R56320 / R56400 |
Other Special Grades | Al6XN, Tin Bronze, Aluminium Bronze, Lead Bronze, Nimonic 75 / 80A / 90 |
ASME B16.36 is a dimensional standard specifically for flanges that include tapped holes used in orifice measurement assemblies. These tapped holes allow pressure taps to be connected for measuring differential pressure across an orifice plate.
Here’s how it differs from ASME B16.5:
Use ASME B16.36 flanges where accurate flow measurement and instrumentation taps are required — common in oil & gas, petrochemical, and process industries.
Jack screw holes in ASME B16.36 flanges are small threaded holes machined into the flange body, typically located opposite the pressure tap locations. These are not for bolting but for the insertion of jack screws used to separate the flange faces during maintenance.
Key functions of jack screw holes:
These features are essential in industries where routine inspection or replacement of orifice plates is required, such as in refineries, power plants, and chemical processing units.
Jack screw hole locations and dimensions are standardized under ASME B16.36 and vary by flange size and pressure class.
Yes, ASME B16.36 flanges are fully compatible with standard orifice plates and gasket types commonly used in flow measurement systems. The standard defines the gasket seating surfaces and gasket dimensions required for reliable sealing and accurate differential pressure readings.
Gasket Compatibility:
Orifice Plate Compatibility:
For best results, always match the gasket material and plate thickness with the process media, pressure class, and flange face type (RF or RTJ).
In ASME B16.36 flanges, tapped holes are precision-machined to allow the installation of pressure taps used in differential pressure flow metering systems. These holes are strategically located to ensure accurate and consistent flow readings.
Key Tapped Hole Positioning Features:
Accurate positioning of tapped holes is critical to ensure precise differential pressure measurement, avoid turbulence, and maintain flow profile integrity across the orifice plate.
Proper installation of ASME B16.36 flanges is essential for achieving accurate flow measurement and maintaining system integrity. These flanges are typically installed in pairs with an orifice plate centered between them and pressure taps aligned correctly.
Installation Guidelines Include:
Following these steps helps ensure measurement accuracy, prevents leakage, and reduces maintenance frequency.
Yes, ASME B16.36 flanges can be customized with additional features and protective coatings to suit demanding industrial environments, particularly in sectors like offshore oil & gas, chemical processing, and high-temperature steam systems.
Common Customization Options Include:
These enhancements help extend service life, improve system safety, and ensure compatibility with specific process media.
Always confirm that any modification still adheres to the dimensional tolerances and pressure integrity requirements of ASME B16.36.
Nutech Overseas is a leading manufacturer and exporter of ASME B16.36 flanges, supplying high-precision orifice flanges to over 40+ countries across multiple continents. Our flanges are used in flow measurement systems for industries like oil & gas, petrochemical, power generation, and offshore platforms.
Major Export Destinations Include:
All exports are backed by international certifications including EN 10204 3.1/3.2, ISO 9001, PED, and full third-party inspection support from TUV, BV, DNV, or Lloyd's as required.