Weldo Flange | Branch Outlet Flange | ASME B16.5 Flange Dimensions, Where Applicable | Class 150–2500
Elite provides Weldo Flanges for branch connections in process piping, combining an integral branch outlet with a flanged connection. The design provides a compact 90° branch connection for connecting smaller or larger branch lines to a main header or pipe while maintaining a bolted flange connection at the branch outlet.
Weldo Flanges are commonly used in process piping, high-pressure systems, headers, manifolds, equipment connections and other applications where a flanged branch connection is preferred. Flange dimensions, pressure class, branch geometry and materials are selected according to the applicable flange standard, branch fitting requirements and project specifications.
| Specification | Details |
|---|---|
| Product Type | Weldo Flange / Weldo Flanged Branch Connection |
| Flange Dimension Standard | ASME B16.5, where applicable |
| Large Diameter | ASME B16.47, where applicable |
| Branch Outlet Standard | MSS SP-97, where applicable |
| Pipeline Applications | MSS SP-44, where applicable |
| Nominal Flange Size | NPS 1/2–24 under ASME B16.5; larger sizes available to project requirements |
| Pressure Classes | 150, 300, 400, 600, 900, 1500, 2500 |
| Branch Configuration | 90° flanged branch connection |
| Facing | RF, FF or RTJ, where applicable |
| Connection | Branch outlet with flanged end |
| Construction | Forged / machined construction, as applicable |
| Branch Bore | Standard or project specific |
| Dimensions | Standard flange dimensions or custom design |
| Heat Treatment | As required by material specification |
| Surface Finish | Standard or customer specified |
| Marking | Size, class, material, heat number and required identification |
| Inspection | Visual, dimensional, material and mechanical testing as applicable |
| NDE | PMI, UT, MT, PT and other methods as specified |
| Documentation | MTC, EN 10204 3.1/3.2, COC and inspection reports |
| Custom Requirement | Details |
|---|---|
| Main Pipe Size | NPS or project-specific diameter |
| Branch Size | NPS or project-specific diameter |
| Pressure Class | 150–2500 or project specified |
| Material | Required material grade |
| Flange Facing | RF / FF / RTJ, where applicable |
| Flange OD | Standard or project specified |
| Flange Thickness | As required |
| Branch Bore | Project specific |
| Branch Wall Thickness | Based on design requirements |
| Bolt Circle | As required |
| Bolt Holes | Number, diameter and configuration |
| Overall Dimensions | Project specific |
| NDE | Project specified |
| Inspection | ITP / third-party requirements |
| Marking | Customer requirements |
| Inspection / Documentation | Availability |
|---|---|
| Material Test Certificate | Available |
| EN 10204 3.1 | Available |
| EN 10204 3.2 | Where specified |
| Certificate of Conformance | Available |
| Dimensional Inspection | Available |
| Chemical Analysis | Material dependent |
| Mechanical Testing | Material dependent |
| Heat Treatment Records | Where applicable |
| PMI | As specified |
| Ultrasonic Testing (UT) | As specified |
| Magnetic Particle Testing (MT) | As specified |
| Liquid Penetrant Testing (PT) | As specified |
| Visual Inspection | Standard |
| Third-Party Inspection | Available |
| ITP | Project specific |
| Material Traceability | Maintained |
| Packing & Marking Records | Available |
Note: A Weldo Flange is a specialized branch connection rather than a conventional standalone flange. The flange portion may use ASME B16.5 or ASME B16.47 dimensions, while the branch geometry and reinforcement are determined by the applicable branch fitting standard, engineering design and project requirements.
Carbon Steel
ASTM A105/A105N, ASTM A181, ASTM A350 LF2/LF3 and ASTM A694 F42, F46, F52, F60 and F65.
Stainless Steel
ASTM A182 F304/F304L, F316/F316L, F321/F321H, F347/F347H, F310/F310S, F317 and F904L.
Duplex & Super Duplex
ASTM A182 F51, F53 and F55.
Alloy Steel
ASTM A182 F1, F5, F9, F11, F12, F22, F91 and F92.
Nickel Alloys
Nickel 200/201, Monel 400/K500, Inconel 600/601/625/800/825, Hastelloy C276 and Alloy 20.
Copper-Nickel Alloys
UNS C70600 and C71500, including 90/10 and 70/30 Cu-Ni alloys.
Material selection is based on operating pressure, temperature, process fluid, corrosion conditions, mechanical requirements and applicable project specifications.
Flanged Branch Connection
The Weldo Flange provides a 90° branch connection with a flanged outlet, allowing the branch line to be connected using standard bolting and gasket arrangements.
Integral Construction
The branch outlet and flange connection are manufactured as an integrated component where specified, providing a compact connection with reduced component count.
Branch Reinforcement
Branch dimensions and reinforcement are designed according to the applicable engineering requirements, pipe size, pressure, temperature and service conditions.
Flange Facing
Available flange facing configurations may include:
Configuration is subject to size, pressure class, material and project requirements.
Elite’s manufacturing and inspection process can include:
Weldo Flanges are commonly used in:
For quotation, provide:
Main Pipe Size + Branch Size + Pressure Class + Material + Facing + Flange Standard + Branch Configuration + Quantity + Inspection Requirements
Example
8″ × 4″ Class 600 Weldo Flange, ASTM A105N, RF, ASME B16.5 flange dimensions, forged construction, EN 10204 3.1.
