Daniel Orifice Flange Unions - Differential Pressure Flow Meters
Rp123000.00
Product Description
Daniel® Orifice Flange Unions are a cost-effective and reliable solution for measuring flow in gas and liquid applications. Designed in compliance with ASME B16.36 and API 14.3/ISO 5167 standards, these flange unions ensure high accuracy through precise bore tolerances, proper tap locations, and robust construction. Ideal for both new installations and system upgrades, these flange assemblies simplify the integration of orifice plates into pipeline systems while maintaining measurement integrity.
Key Features
Standards Compliance: API 14.3 (AGA3), ISO 5167, ASME B16.36
Forged Steel Body: Standard ASTM A105 carbon steel; optional materials available
Precise Tap Locations: ±0.016-in for 3" and smaller; ±0.031-in for 4" and larger
Tap Connections: 0.50-in NPT standard; socket weld optional
Bore Smoothness & Tolerances: Bore ID meets strict API recommendations
Gaskets Included: Two 0.063-in non-asbestos gaskets for raised face flanges
Alignment Pins: Knock-out type dowel pins for 2" to 8" RF flanges
Jack Screws Included: For safe and easy orifice plate removal
Mechanical & Material Specifications
Parameter | Specification |
Line Sizes | 2" to 8" standard |
Pressure Ratings | ANSI 600 to ANSI 2500 |
Temperature Range | -20°F to +250°F (Standard), -100°F to +250°F (Low Temp Option) |
Flange Types | Raised Face Weldnek, Ring-Type Joint (RTJ) Weldnek |
Tap Hole Size | 0.38" or 0.50" (varies by size) |
Standard Gasket Types | Grafoil, Spiral Wound, Garlock Gylon (RF); RTJ uses integrated orifice holders |
Materials (Standard) | A105 Carbon Steel, A350 LF2 (Low Temperature) |
Bore Sizes | Schedule 40 and 80 standard |
Assembly Hardware | Studs (ASTM A193 Gr. B7), Nuts (ASTM A194 Gr. 2H), Jack Screws included |
Weights | Approx. 27 lbs (2" Class 300) to 1152 lbs (8" Class 2500 RTJ) |
Available Classes and Configurations
ANSI 300 / 600 / 900 / 1500 / 2500
RF and RTJ flanges
Threaded and socket weld tap types
Standard bore dimensions per pipe schedule or custom as specified
Applications
Natural gas transmission
Oil and gas flow measurement
Pipeline and process metering
Custody transfer
Upstream and downstream facilities
