Explore our flagship high-flow linear shower drains, heavy-duty floor drain assemblies, and precision stainless steel fixtures manufactured for global infrastructure projects.
Ningbo Xianglong Metal Products Co., Ltd. brings 26 years of metallurgy precision, automated fabrication, and accredited compliance to global OEM/ODM partnerships.
Our operational ecosystem holds German TUV, ISO 9001:2015 Quality Management, and ISO 14001:2015 Environmental Management certifications, ensuring rigorous quality assurance at every manufacturing stage.
From rapid CAD prototyping to CNC laser cutting, automated precision bending, laser welding, and PVD vacuum surface treatment, we offer end-to-end custom production tailored to international building codes.
Trusted by premier international plumbing brands including AOB (USA), ASTERM & WIRQUIN (Europe), DELTA (Australia), and COFLEX (Mexico) for heavy-duty commercial and luxury residential installations.
An Engineering Guide for Plumbing Specifiers, Architectural Consultants, and Commercial Procurement Executives
In modern architectural engineering and high-load commercial infrastructure, selecting the appropriate sub-floor drainage assembly is paramount to preventing structural water ingress, acoustic reverberation, and premature corrosion. Heavy-duty cast iron body drains paired with 304 or 316-grade stainless steel linear grates represent the optimal hybrid solution for modern high-rise developments, commercial hospitality kitchens, and industrial processing wetrooms.
Cast iron (grey iron GG20/GG25 or ductile iron GGG40) provides exceptional compressive strength, dimensional stability under thermal strain, and superior acoustic damping compared to lightweight plastic alternatives. The dense graphite flake matrix inside grey cast iron effectively dampens hydraulic impact noise caused by high-flow discharge, satisfying stringent acoustic isolation codes (such as DIN 4109 and ISO 140-10) in luxury hotels and multi-family residential towers.
By combining a heavy cast iron sump body with a precision-laser-cut AISI 304/316 stainless steel top grate, engineers achieve the ultimate equilibrium: massive load-bearing resistance below floor level paired with hygienic, anti-bacterial, and visually refined surface finishes above.
The following engineering matrix outlines performance variables across primary drainage materials utilized in commercial wetroom construction:
| Material / Alloy Spec | Tensile Strength (MPa) | Acoustic Damping (dB Rate) | Corrosion Resistance | Load Class Rating (EN 1253) | Primary Application |
|---|---|---|---|---|---|
| Grey Cast Iron (GG25) | 250 - 350 | Superior (-12 to -15 dB) | High (Asphalt/Epoxy Coated) | Class M 125 (125 kN) | Heavy Commercial Sump Bodies |
| AISI 304 Stainless Steel | 520 - 720 | Moderate (-3 to -5 dB) | Exceptional (Passivated) | Class L 15 (15 kN) | Shower Grates & Linear Channels |
| AISI 316L Stainless Steel | 580 - 750 | Moderate (-3 to -5 dB) | Maximum (Acid/Saline Proof) | Class L 15 / R 50 | Coastal Hotels & Chemical Facilities |
| Ductile Cast Iron (GGG40) | 400 - 500 | High (-8 to -10 dB) | High (Bituminous/PVD) | Class N 300 (300 kN) | Industrial Washrooms & Parking Decks |
Drainage failure in high-occupancy commercial properties stems primarily from two mechanisms: insufficient hydraulic flow rates and bio-waste accumulation (hair, soap scum, grease deposits). Ningbo Xianglong’s engineering team utilizes Computational Fluid Dynamics (CFD) simulation to optimize internal siphon traps and channel slopes.
Our heavy-duty floor drains achieve flow rates up to 1.2 Liters/second (19 GPM) under standard hydraulic head conditions, exceeding ASME A112.18.2 / CSA B125.2 and EN 1253 standards. Incorporated removable hair strainers and dual-stage mechanical anti-odor dry traps ensure continuous gas isolation (blocking hydrogen sulfide and sewer odors) even during extended dry spells when conventional water traps evaporate.
Engineered to comply with regional plumbing codes across North America, Europe, Australia, and the Middle East. Explore our extensive application library below:
Triangle Floor Drain For Bathroom Remodeling
Anti Clog Shower Drains For Bathroom Remodeling
Vertical Shower Drains For Commercial Hospitality
Square Shower Drains For Public Restrooms
Easy Install Floor Drain For Public Restrooms
Anti Clog Horizontal Drain For Public Restrooms
Insect Proof Square Floor Drain For Public Restrooms
Odor Proof Triangle Floor Drain For Public Restrooms
Vertical Shower Drains For Balcony Drainage
Rotatable Drain For Balcony Drainage
High Flow Rotatable Drain For Balcony Drainage
Center Outlet Drain For Balcony Drainage
Square Shower Floor Drain For Industrial Washrooms
Triangle Floor Drain For Industrial Washrooms
Triangular Shower Drain For Outdoor Wetrooms
Metal Shower Drains For Outdoor Wetrooms
Cuttable Shower Drains For Outdoor Wetrooms
Hair Catcher Side Drain For Outdoor Wetrooms
Anti Clog Horizontal Drain For Kitchen Sanitation
Center Outlet Drain For Swimming Pool Decks
Corner Triangle Floor Drain For Swimming Pool Decks
Vertical Shower Drains For Outdoor Wetrooms
Shower Drains For Outdoor Wetrooms
Odor Proof Triangle Floor Drain For Balcony Drainage
Square Shower Drains For Swimming Pool Decks
Universal Drain For Balcony Drainage
Square Shower Drains For Commercial Hospitality
Anti Clog Shower Drains For Outdoor Wetrooms
Hair Catcher Side Drain For Bathroom Remodeling
Horizontal Shower Drains For Bathroom Remodeling
Operating a 13,000 square meter standardized plant in Ningbo, China, we integrate six core precision manufacturing modules under strict ISO 9001 governance.
High-precision fiber laser cutting systems ensure sub-millimeter tolerances on raw metal sheets, enabling intricate slot designs, custom logos, and exact dimensions for specialized floor layouts.
Automated hydraulic press lines stamp heavy-duty cast iron molds and stainless steel channels with zero stress fracturing, guaranteeing structural uniformity across bulk order quantities.
Seamless TIG and laser welding processes create 100% leak-proof joints between channel bodies and outlet spigots, eliminating structural weak points and preventing subterranean water leakage.
Advanced Physical Vapor Deposition (PVD) applies nano-thin metallic titanium coatings in Matte Black, Brushed Gold, Rose Gold, and Gunmetal, delivering extreme scratch and chemical resistance.
Acid pickling, chemical passivation, and mechanical electropolishing strip iron contaminants, forming a resilient chromium-oxide layer for extended service life in aggressive marine and wet room environments.
Every batch undergoes dimensional verification, salt spray anti-corrosion testing (NSS 72+ hours), loading stress analysis, and hydrostatic seal inspection before automated packaging.
Ningbo Xianglong Metal Products Co., Ltd. serves as a tier-1 direct manufacturing partner to globally recognized sanitaryware and building material supply leaders.
Established in 2000, Ningbo Xianglong Metal Products Co., Ltd. has spent 26 years perfecting precision metal fabrication across custom floor drains, stainless steel wall niches, coffee bean storage dispensers, and specialized architectural metalwork. Spanning over 13,000 square meters of production space with more than 100 dedicated technical personnel, our facility directly serves clients in North America, Europe, Australia, and South America.
Our long-term brand collaborations include industry leaders such as AOB (USA), ASTERM & WIRQUIN (Europe), DELTA (Australia), and COFLEX (Mexico). By integrating engineering research and development with raw material scale in China, we deliver zero-risk procurement, certified product reliability, and direct port dispatch efficiency.
Beyond heavy-duty floor drains, Xianglong engineers modular stainless steel niches and space-saving bathroom storage solutions for holistic wetroom architecture.
Our floor drains adapt flexibly across diverse structural conditions including curbless wetroom showers, dry/wet separated residential bathrooms, high-occupancy commercial washrooms, and outdoor swimming pool surrounds. Designed for tile-in concealment or decorative metal finish displays.
Precision-welded 304 stainless steel wall niches offer seamless wall installation without traditional tile-in labor complexity. Available in multiple PVD colors and single/double shelf configurations, providing waterproof, rust-proof storage for modern interior designs.
Utilizing triangular mechanical structure principles, our stainless steel bathroom shelves provide rigid load support while maximizing wetroom corner spaces. Corrosion-resistant surfaces withstand constant humidity and soap contact.
Clear answers to technical inquiries from MEP engineers, project specifiers, and OEM wholesale buyers.
Complete your procurement requirements with our high-flow side drains, coffee storage dispensers, and linear channel solutions.
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