Drainage Systems — Industrial Floor Drainage Solutions
Every manufacturing or processing facility moves liquid: washdown water in food plants, coolant and hydraulic fluid in machine shops, chemical runoff in treatment works, stormwater across loading yards. An industrial drainage system collects that liquid in channels and carries it to discharge — and the grating on top is what keeps the channel safe to walk and drive over while letting water through. GoGrating fabricates that grating layer: trench drain covers, channel grating, and surface drainage panels, produced factory-direct in Anping, Hebei — the region that manufactures the majority of China's steel grating.
Because drainage layouts differ on every project — channel widths, frame details, traffic loads, chemical exposure — we build to order rather than selling stock SKUs. Send your trench dimensions, drawings, or CAD files through our Request a Quote page and our engineers will confirm a fabrication specification in steel grating or FRP grating to suit.
Industrial Drainage Systems
Most facility drainage falls into three patterns. Linear trench drains run along production lines, doorways, and washdown bays, topped with removable grating sections. Point drains collect at low spots under individual machines or floor sinks, covered by small square or round grates. Perimeter and area drainage uses larger grating panels over sumps, pits, and culverts where open area and load capacity both matter. GoGrating supplies the grating element for all three, cut and banded to the channel or frame you specify.
Material selection follows the environment. Hot-dip galvanized steel (coated to ASTM A123) handles forklift and truck traffic in warehouses, yards, and heavy industry. Stainless 304 or 316 suits food, beverage, and pharmaceutical plants where hygiene and frequent washdown rule out carbon steel. FRP grating — molded or pultruded, in orthophthalic, isophthalic, or vinyl ester resins — is the answer where chemical plants, galvanizing lines, and wastewater works would corrode any metal. See our applications overview for environment-by-environment guidance.
Drainage Products
Trench drain covers. Welded steel bar grating cut to your channel width, with banding bars on all cut edges. Standard bearing bar pitches follow the 19-space (≈30 mm) and 15-space (≈24 mm) series per ANSI/NAAMM MBG 531 and YB/T 4001.1; tighter pitches and serrated bearing bars are available where pedestrian slip resistance or heel-safety is a requirement. Covers can be supplied loose-laid, bolted, or with lift-out handles for cleaning access.
Channel systems. For new construction we supply grating together with matching steel angle frames — embedded edge angles that cast into the concrete and seat the grating flush with the floor. Lock-down options (saddle clips, countersunk bolting) keep panels in place under wheeled traffic. Frames and covers ship as matched sets so site fit-up is a drop-in job.
Drainage panels. Larger grating panels cover sumps, pump pits, cable trenches, and stormwater culverts. These are fabricated to order — rectangular, notched around pipework, or radius-cut — from your dimensioned drawing. FRP covered-top panels are available where you need drainage below but a closed, gritted walking surface above.
Drainage Specifications
Flow capacity. Hydraulic performance is set mainly by the grating's open area, which on plain steel bar grating typically falls in the 60–80% range depending on bearing bar pitch and cross bar spacing. Wider 19-space pitch maximizes flow for outdoor and heavy-process drainage; narrower 15-space or close-mesh options trade some open area for pedestrian safety in walkways and public-facing zones. Tell us your design flow and channel size and we will recommend a pitch.
Load class. Drainage covers in trafficked areas are commonly specified against the EN 1433 load classes (A15 pedestrian through F900 airport/dock pavements) or against project axle loads. We do not publish generic load numbers, because safe capacity depends on bearing bar size, span, and support detail together. Instead, specify your span and traffic class and we will return an engineered load table for the exact section — bearing bars range from 20×3 mm for light-duty covers up to 100×9 mm for heavy vehicular spans.
All fabrication runs under ISO 9001 with CE-marked product available for European projects, galvanizing to ASTM A123, and grating manufactured to YB/T 4001.1 or ANSI/NAAMM MBG 531 as your specification requires. Request a quote with your drawings — DWG, DXF, PDF, or a simple dimensioned sketch all work.
| Bearing bar size | 20×3 to 100×9 mm |
| Bearing bar pitch | 19-space (≈30 mm) / 15-space (≈24 mm) series |
| Cross bar spacing | ≈50 / 100 mm (2-space / 4-space) |
| Panel dimensions | Fabricated to channel / frame dimensions |
| Open area | Typically 60–80%, pitch-dependent |
| Materials | Carbon steel, stainless 304/316, FRP (molded or pultruded) |
| Surface finish | Hot-dip galvanized (ASTM A123) / painted / untreated / stainless |
| Surface profile | Plain or serrated (anti-slip) |
| Load class reference | EN 1433 A15–F900; engineered load tables on request |
| Standards | YB/T 4001.1, ANSI/NAAMM MBG 531, ISO 9001, CE |
- Trench covers, channel sets, and panels made to project dimensions
- Steel, stainless 304/316, and FRP material options
- Hot-dip galvanizing to ASTM A123
- Serrated anti-slip surface available
- Matched embedded angle frames and lock-down fixings
- Drawings and CAD files welcome — DWG, DXF, PDF
Frequently Asked Questions
Can you fabricate drainage grating to our channel drawings?
Yes — that is our standard workflow. Send DWG, DXF, or PDF drawings (or a dimensioned sketch) with your channel widths, frame details, and traffic class, and we return a fabrication drawing for approval before production. Notched, radius-cut, and bolted covers are all routine.
Is there a minimum order quantity for drainage covers?
We are export-oriented, so orders are typically project-sized — full trench runs or container-efficient quantities rather than single pieces. Small trial orders can often be combined with other grating items; tell us your project scope and we will confirm feasibility.
What load rating do your trench drain covers carry?
Capacity depends on bearing bar section, span, and support detail, so we do not quote generic numbers. Specify your span and traffic class — pedestrian through heavy vehicle, or an EN 1433 class — and we will provide an engineered load table for the exact section.
What is the typical lead time for export orders?
Lead time depends on quantity, finish, and current production load — fabricated and hot-dip galvanized orders generally take several weeks from drawing approval. We confirm a firm production and shipping schedule with every quotation.