ASME B16.36 Orifice Flanges

Engineered for Accurate Flow Metering in Critical Processes 1. Product Overview Standard : ASME B16.36 (Latest Edition) Materials : ASTM A182 304/304L, 316/316L, 347 Size Range : ½" to 24" (DN15 to DN600) Pressure Classes : 300#, 600#, 900#, 1500#, 2500# Face Types : Raised Face...

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Product Introduction

Engineered for Accurate Flow Metering in Critical Processes

1. Product Overview

Standard: ASME B16.36 (Latest Edition)

Materials: ASTM A182 304/304L, 316/316L, 347

Size Range: ½" to 24" (DN15 to DN600)

Pressure Classes: 300#, 600#, 900#, 1500#, 2500#

Face Types: Raised Face (RF), Ring Joint (RTJ)

Temperature Range: -20°F to 1000°F (-29°C to 538°C)

2. Key Design Features

✔ Integrated Orifice Taps: 1/2" NPT or flange taps standard
✔ Dual-Chamber Design: For pressure differential measurement
✔ Precision Bore: Machined to ±0.001" tolerance
✔ Flange Pair Matching: Guaranteed alignment for gasket sealing
✔ Vortex-Free Flow: Smooth upstream/downstream pipe sections

3. Technical Specifications

Parameter	Specification
Bore Diameter Tolerance	±0.1% of nominal
Tap Hole Alignment	±1° angular tolerance
Surface Finish	32-63 μin (0.8-1.6 μm) Ra
Pressure Rating	Per ASME B16.5 equivalent class
Dimensional Standard	ASME B16.36 Table 2

4. Material Selection Guide

Material	ASTM	Max Temp (°F)	Best For
304/304L	A182	1500	Steam, water
316/316L	A182	1500	Corrosive media
347	A182	1500	High-temp applications

5. Manufacturing Process

Precision Forging: Grain structure optimization

CNC Machining: 4-axis machining of bore and faces

Tap Hole Drilling: Gun-drilled with <0.005" TIR

Surface Finishing: Electropolishing available

Testing: Dye penetrant on all welds

6. Quality Assurance

Bore Calibration: Certified with NIST-traceable instruments

Dimensional Checks: Per ASME B16.36 Annex A

Material Certs: EN 10204 3.1 with PMI

Hydrostatic Test: 1.5x rated pressure (optional)

Flow Profile Report: Available upon request

7. Industry Applications

Oil & Gas: Custody transfer metering

Chemical: Process flow measurement

Power: Steam flow monitoring

Water: Treatment plant flow control

Pharma: Clean-in-place systems

8. Why Choose Our Orifice Flanges?

✔ ASME B16.36 Full Compliance
✔ Laboratory-Grade Accuracy
✔ Custom Tap Configurations (Radial/Diameter taps)
✔ NACE MR0175 Options for sour service
✔ Complete Metering Packages (With orifice plates & fittings)