Robot Animation
Structure Fittings Plugs

Structure Fittings Plugs

Structure fittings plugs are flush-fitting end caps designed to seal open ends of structural tubes used in support frameworks for borosilicate glass process equipment. Goel Scientific manufactures these plugs in hot-dip galvanised iron, stainless steel, and PVC, with sizes matching standard galvanised structural tube nominal bores (NB). They help prevent dust, moisture, insects, and other contaminants from entering tube cavities while protecting internal surfaces from corrosion. Designed for pharmaceutical, chemical, laboratory, and cleanroom installations, the plugs provide a neat, flush finish. Each plug is dimensionally inspected for consistent fit, with custom sizes available for non-standard tube diameters.

Request a Quote

Key Features

  • Positive Seal Against Contamination: Structure fittings plugs prevent dust, moisture, and insect ingress into open tube interiors.
  • Flush Closure Without Protrusion: Inserts cleanly into the tube end to preserve the clean aesthetic and functional integrity of the support frame.
  • Interference Push-Fit: Machined/moulded for a secure press-fit retention inside standard tube bores without requiring adhesives or external fasteners.
  • Catalogue Model Standardisation: Available across standard catalogue models (PLUG15 to PLUG50) covering 15 NB to 50 NB tube sizes.
  • Multiple Material Options: Galvanised iron, stainless steel (SS 304/SS 316), and durable PVC variants for diverse service environments.
  • Corrosion Protection: Internal surface of the galvanised structural tube is protected from moisture condensation and airborne chemical attack.

Specifications

Parameter Standard Range
Catalogue Models PLUG15, PLUG25, PLUG30, PLUG40, PLUG50
Nominal Bore (NB) Compatibility 15 NB, 25 NB, 30 NB, 40 NB, 50 NB
Configuration Single-piece flush end cap (press/insert fit)
Material Options Hot-dip Galvanised Iron, Stainless Steel (SS 304 / SS 316), PVC
Fit Type Interference push-fit (flush closure without protrusion)
Surface Finish Hot-dip galvanised, electropolished, or moulded PVC
Custom Sizes Available on request for non-standard tube dimensions

Applications

  • Sealing open tube ends in framework skeletons for glass reactors.
  • End-cap protection for pilot plant support structures.
  • Cleanroom framework installations requiring a flush, finished appearance and contamination barriers.
  • Laboratory benchtop rack systems in pharmaceutical R&D laboratories.
  • Support frames for heat exchangers, distillation columns, and overhead glass assemblies.
  • Outdoor framework installations requiring weather and moisture sealing.
  • Aggressive chemical service environments using stainless steel or PVC plugs.

Why Choose Us?

Established in 1977, Goel Scientific Glass Works Ltd. (a Borosil Scientific company) manufactures structure fittings plugs alongside its complete range of borosilicate glass process equipment and structural framework components. Serving over 2,800 customers across pharmaceutical, chemical, and life-science industries, Goel Scientific supplies structure fittings plugs built strictly to catalogue model standards (PLUG15 through PLUG50) with material choices matched to the intended service environment. Every plug is dimensionally inspected before despatch to ensure complete interchangeability with Goel Scientific structural tubular frameworks.

FAQs

Structure fittings plugs are used to seal open ends of structural tubes in support frameworks. They prevent contamination ingress, protect the internal tube surface from corrosion, and provide a flush, finished appearance suitable for GMP-controlled environments.

Plugs are simple to install; they are pressed or inserted directly into the structural tube ends, providing a flush closure without protrusion that preserves the framework's functional integrity.

Plugs are catalogued by Nominal Bore (NB): PLUG15 (15 NB), PLUG25 (25 NB), PLUG30 (30 NB), PLUG40 (40 NB), and PLUG50 (50 NB).

Yes, structure fittings plugs are engineered to match standard galvanised structural tube internal diameters. The interference fit provides secure retention without adhesive or mechanical fasteners.

Yes, Goel Scientific manufactures structure fittings plugs in non-standard tube diameters and alternative materials to suit specialised installation requirements and unique project specifications.