Roben, Mfg., Inc. specializes in the custom engineering and fabrication of fabrication of internals (trays, support rings, distribution pipes...) for chemical, fine chemical, petrochemical, pharmaceutical, food and beverage, defense, and power-generation industries. Every project is designed to ASME Section VIII Division 1 (with optional Division 2), is National Board registered, complies with the European Pressure Equipment Directive (PED 2014/68/EU) for CE marking, and is registered under the Canadian Registration Number (CRN) system for all Canadian provinces.
What Fabrication of Internals (Trays, Support Rings, Distribution Pipes...) Are
Column internals fabrication encompasses the precision manufacture of trays, support rings, downcomers, distribution pipes, packing supports, demisters, and feed inlets. These components live inside the column and drive the vapor-liquid mass transfer — their geometry, tolerances, and metallurgy directly affect column performance.
Why Fabrication of Internals (Trays, Support Rings, Distribution Pipes...) Matter
Internals must be fabricated to tight tolerances on flatness, levelness, and weir height to achieve the column's design separation. Roben's fabrication shop holds the tolerances, materials, and welding qualifications required to deliver internals that perform to spec.
Fabrication of Internals (Trays, Support Rings, Distribution Pipes...) — Specifications and Capabilities
- Trays: Sieve, valve (fixed and floating), bubble cap, dual-flow
- Support rings: Welded to shell, with shop-mounted alignment pins
- Distribution pipes: Drilled-hole, slot, or chevron-trough types
- Downcomers: Straight, sloped, multi-pass, parallel-flow
- Demisters: Mesh pads, vane packs
- Tolerances: Tray flatness ≤ 1/8 in., weir height ±1/16 in., support ring level ≤ 1/8 in.
Certifications and Codes
- ASME Section VIII Division 2 — available on request
- National Board registration — R-stamp
- PED 2014/68/EU — CE marking with Notified Body coordination
- CRN — registered for all Canadian provinces
- NACE MR0175 / ISO 15156 — sour-service compliance
- AWS D1.1 / ASME Section IX — qualified welding procedures and welders
Frequently Asked Questions About Fabrication of Internals (Trays, Support Rings, Distribution Pipes...)
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