Project overview
| Item | Detail |
|---|---|
| Destination | Pakistan |
| Equipment | Stainless steel coarse bar screen (coarse trash rack / coarse grille) |
| Typical application | Intake front screening for irrigation, drainage, and pump-station works |
| Scope | Equipment supply, export packing, document support, and installation guidance |
| Trade context | China manufacture → ocean export to Pakistan |
This case study covers a Pakistan-bound supply of a stainless steel coarse bar screen—a fixed coarse grille installed at the water intake to intercept large debris before it reaches fine screens, gates, or pumps. The buyer needed a corrosion-resistant front barrier suited to sandy, debris-laden canal water and long outdoor exposure.
Project background
Many Pakistani irrigation canals and pump intakes carry branches, plastic waste, crop residue, and occasional large floating objects during flood peaks. Without a coarse screen, debris strikes pumps and gate equipment directly, raising downtime and repair cost. A coarse bar screen is the first defensive line: bar spacing is wide enough for design flow, yet narrow enough to stop bulky trash.
Site priorities for this export order included:
- Stainless steel construction for humid outdoor and splash-zone service
- Bar spacing matched to the design debris size and pump protection requirement
- Sectional or hoist-friendly panels for easier maintenance during flood season
- Ocean packing and commercial documents suitable for Pakistan port clearance
## Equipment selection: why stainless steel coarse bar screen
Carbon-steel trash racks can work when coating systems are maintained carefully. For this project, **stainless steel** was selected to reduce coating dependence and rust risk at weld edges and submerged zones—especially where inspection intervals may be irregular.
A coarse bar screen typically includes:
- Vertical (or inclined) stainless bars at defined clear spacing
- Top and bottom beams / side frames for structural support
- Anchoring interfaces to civil concrete or steel supports
- Optional lifting points for sectional removal and cleaning
Bar thickness, spacing, inclination, and span were confirmed against the buyer’s intake width, design water level, and expected debris load. Coarse screens are not a substitute for fine screening or automatic trash rakes; they stop large objects first so downstream cleaners and pumps operate more safely.
## Manufacturing and inspection focus
Before shipment, checkpoints included:
- Bar spacing accuracy and frame squareness
- Weld quality on stainless structural joints
- Surface finish and protection of sealing / contact edges where required
- Fit-up of sectional panels and lifting points
- Packing list alignment with marked packages for customs inspection
Stainless assemblies were packed to avoid chloride-contaminated moisture entrapment where possible, with separators between panels and clear shipping marks for multi-package sets.
## Export to Pakistan
China-side documents prepared for the importer’s broker typically included commercial invoice, packing list, bill of lading draft, and certificate of origin when requested. Destination customs declaration, duties, and inland haulage remained with the importer of record. Packing was arranged for ocean transit to Pakistan, with attention to panel protection against impact and moisture during port handling.
## Project outcome
Once installed at the intake, the stainless steel coarse bar screen was intended to:
- Intercept large floating and drifting debris before pumps and gates
- Reduce impact damage and entanglement risk on downstream equipment
- Provide a durable, low-maintenance front barrier in outdoor canal conditions
- Allow sectional lifting for cleaning during high-debris periods
Service results depend on correct civil anchoring, bar orientation to flow, and a routine cleaning plan—manual or with a companion trash rake where the intake is wide.
## Summary
This Pakistan export case shows a straightforward intake protection approach: a **stainless steel coarse bar screen** sized to channel width and debris class, manufactured for outdoor corrosion resistance, and shipped with clear export documents. For similar South Asia irrigation and pump projects, bar spacing and stainless grade should be fixed from drawings early—changing spacing after fabrication is costly.
