Weld Neck Orifice Flanges: ASME B16.36, Class 300 to 2500. Get quotes from verified suppliers on MetalMitra.
- Weld Neck Orifice Flanges
- Orifice Flanges
- ASME B16.36
- Class 300 to 2500
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Specifications
| Standard | ASME B16.36 |
|---|---|
| Material | ASTM A105, A182 F304 / F316, A350 LF2 |
| Size | 1" to 24" |
| Class | 300, 600, 900, 1500, 2500 |
| Facing | RF, RTJ |
| Pressure Taps | 1/2" NPT or socket weld, 2 per flange |
| Certification | EN 10204 3.1 |
Grades & standards
- Stainless Steel 304
- Stainless Steel 316
- Carbon Steel A105
- ASTM A182
- ASTM A105
- ASME B16.36
Chemical composition & mechanical properties
| C | Mn | P | S | Si | Cr | Ni | N |
|---|---|---|---|---|---|---|---|
| 0.07 | 2.00 | 0.045 | 0.030 | 0.75 | 17.5–19.5 | 8.0–10.5 | 0.10 |
| Tensile strength, min | 515 MPa |
|---|---|
| Yield strength (0.2%), min | 205 MPa |
| Elongation in 50 mm, min | 40% |
| Hardness, max | 201 HBW |
Single values are maximums unless marked min. Values per ASTM A240 (plate, sheet and strip); always confirm against the purchase specification and the mill test certificate.
| C | Mn | P | S | Si | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|
| 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | 0.10 |
| Tensile strength, min | 515 MPa |
|---|---|
| Yield strength (0.2%), min | 205 MPa |
| Elongation in 50 mm, min | 40% |
| Hardness, max | 217 HBW |
Single values are maximums unless marked min. Values per ASTM A240 (plate, sheet and strip); always confirm against the purchase specification and the mill test certificate.
| C | Mn | P | S | Si |
|---|---|---|---|---|
| 0.35 | 0.60–1.05 | 0.035 | 0.040 | 0.10–0.35 |
| Tensile strength, min | 485 MPa |
|---|---|
| Yield strength (0.2%), min | 250 MPa |
| Elongation in 50 mm, min | 22% |
| Hardness, max | 187 HBW |
Single values are maximums unless marked min. Values per ASTM A105 (forgings); always confirm against the purchase specification and the mill test certificate.
Source Weld Neck Orifice Flanges from verified manufacturers, mills and stockists on MetalMitra. Weld neck orifice flanges with pressure taps and jack screws for accurate differential-pressure flow metering.
Share your size, grade, quantity and delivery location once, and compare offers from suppliers who stock or manufacture Weld Neck Orifice Flanges to ASME B16.36.
What you can source
- Weld Neck Orifice Flanges — The most common type for flow metering runs.
- Slip-On Orifice Flanges — For lower-pressure metering lines.
- Threaded Orifice Flanges — For small-bore lines where welding is avoided.
- Orifice Assemblies — Flange pairs with orifice plate, jack screws and studs.
Key properties
- Accurate Metering — Pressure taps for differential flow measurement.
- Jack Screws — Easy separation for plate inspection and change-out.
- Class 300 & Above — Made to ASME B16.36 pressure classes.
- Full Assemblies — Supplied with plates, gaskets and bolting on request.
Applications & industries
- Flow Measurement
- Oil & Gas Pipelines
- Refineries
- Gas Metering Stations
- Power Plants
- Chemical Plants
Testing & documentation
Inspection and documentation for Weld Neck Orifice Flanges follow ASME B16.36 plus any extra requirements in your PO.
- Visual & dimensional inspection
- Positive material identification (PMI)
- Hardness test
- Ultrasonic test as applicable
- Third-party inspection on request
- EN 10204 3.1 Mill Test Certificate
Why source on MetalMitra
- Verified suppliers — Mills, manufacturers and stockists are reviewed by the MetalMitra team before they list.
- One RFQ, several quotes — Share size, grade and quantity once and compare offers side by side.
- Full traceability — Heat numbers, test certificates and third-party inspection on request.
- Delivered worldwide — Export-worthy packing and shipping to India, the Middle East, Africa, Europe and the Americas.
Request pricing
Post an RFQ for Weld Neck Orifice Flanges with your drawing or specification and receive quotes from verified suppliers.
Technical note: Values on this page are for reference. Always confirm against the governing standard, your purchase specification and the test certificate.
Applications & industries
- Flow Measurement
- Oil & Gas Pipelines
- Refineries
- Gas Metering Stations
- Power Plants
- Chemical Plants
- Oil & Gas
- Petrochemical & Refining
- Power Generation
- Chemical Processing
Testing & documents
Ask for the documents you need in your requirement — suppliers confirm them in their quotation:
- Mill test certificate to EN 10204 3.1, or 3.2 with third-party witness
- Third-party inspection (TPI) by SGS, Bureau Veritas, TÜV or your nominated agency
- Tests as the standard or your order requires: hydro, PMI, IGC, NDT, hardness or impact tests
FAQs
ASME B16.36 covers orifice flanges in Class 300 and above.
Normally two taps per flange, 180 degrees apart, in 1/2" NPT or socket weld.
They can be supplied as a complete assembly with orifice plate, gaskets and stud bolts.
Need Weld Neck Orifice Flanges?
Share grade, size, quantity and delivery location. We compare suitable suppliers and come back with a clear quotation.
