Finishing treatment methods for hotel MEP pipes penetrating decorative surfaces

Finishing treatment methods for hotel MEP pipes penetrating decorative surfaces

I am decoration specialist Chris Zhang, focusing on the detail coordination between decoration and MEP. The "closure treatment methods for hotel MEP pipes penetrating decorative surfaces" you mentioned is an extremely critical part of decoration construction, directly affecting the hotel's overall aesthetics, functionality and long-term maintenance. In hotel projects, when MEP pipes (such as air-conditioning ducts, water pipes, cable trays, etc.) penetrate decorative surfaces (such as ceilings, walls, floors), improper closure can lead to water leakage, noise, thermal bridges, dust accumulation and even structural safety hazards. According to Clause 4.0.1 of GB50222-2017 Code for Fire Prevention in Design of Interior Decoration of Buildings, decorative materials must meet fire performance requirements, and when pipes penetrate decorative surfaces, the closure must take into account firestop sealing, waterproof sealing and visual aesthetics. Based on years of experience, the following analysis covers common types and specific practices.

Common Closure Treatment Methods

• Practice: Use finished metal closure rings or custom stainless steel cover plates, combined with fire-resistant sealant (such as silicone weatherproof sealant) to fill the gaps. For example, when air-conditioning water pipes penetrate gypsum board ceilings, first install fire-resistant putty or rock wool sealing around the pipes (in accordance with the fire protection requirements for pipe shafts in Clause 4.0.6 of GB50222), then cover with decorative rings.
• Case: In the corridor ceiling of a five-star hotel, when fire sprinkler pipes penetrated the ceiling, galvanized steel rings of matching diameter were used, painted in the same color as the ceiling, with gaps sealed with fire-resistant sealant, which both satisfied fire acceptance and avoided later cracking.

• Practice: Pre-embed sleeves (such as PVC or steel sleeves) where pipes penetrate walls, fill the space between the sleeve and the pipe with flexible sealing material (such as polyurethane foam), and finish the outer opening with decorative cover plates or sealant. If the pipe is a hot water pipe, thermal expansion and contraction must be considered, and expansion joints should be added.
• Case: In the bathroom of a hotel guest room, when drainage pipes penetrated light steel keel partition walls, thickened stainless steel decorative covers with rubber gaskets were used to prevent moisture penetration that could cause wall mold.

• Practice: Install water-stop rings (such as rubber water-stop rings) where pipes exit the floor, and cover with floor decorative covers (such as brass or stainless steel), with the cover plates flush with the floor and gaps sealed with epoxy resin adhesive.
• Case: In the lobby of a hotel, when underfloor heating pipes penetrated marble flooring, custom brass cover plates were used, with a waterproof cushion layer installed at the bottom of the cover plates, avoiding discoloration of the stone due to water absorption.

Key Standards and Experience Points

• Firestop sealing: According to Clause 4.0.5 of GB50222, pipes penetrating fire-rated walls shall use firestop sealing materials (such as fire-resistant putty, fire-resistant boards) to ensure a fire resistance rating of not less than 1 hour.
• Waterproofing and moisture protection: In wet areas (such as bathrooms, kitchens), when pipes penetrate decorative surfaces, they must be combined with the waterproof layer, and waterproof coating shall be applied at the closure to avoid leakage.
• Aesthetic coordination: Cover plate materials should match the decorative surface (such as metal cover plates for modern style, wooden cover plates for traditional style), and after installation there should be no exposed screws or adhesive marks.

Summary

The above are reference opinions. The actual project conditions still need to be further evaluated and implemented in combination with specific working conditions, site conditions and other factors.