Industrial belts served: Haldia · Durgapur · Asansol · Howrah · Kalyani · Taratala · Dankuni
The Kolkata belt combines a long humid monsoon with a working river port and a heavy industry corridor running out to Durgapur and Asansol — three different exposure conditions inside one delivery area.
Haldia in particular needs the tray specified zone by zone. Refinery process areas, the outdoor rack network and the dock structures each call for a different grade, and carrying one finish across all three is either wasteful or short-lived.
Mitool Equipments Pvt. Ltd. manufactures cable management systems at MIDC Additional Ambernath in Thane district and supplies them throughout Kolkata & Haldia. We quote against your cable schedule and tray layout rather than a generic size list — send the drawing with the finish required and the quotation comes back with tray sizes, bends, reducers, coupler plates and supports listed line by line, with a dispatch date.
Slotted base that lets cable heat escape and allows clamping and hold-down at any point along the run. The highest-volume tray type on most Kolkata and Haldia projects.
Open rung construction for the heavy end of the cable schedule — feeds to motors, presses, compressors and switchrooms, on wider support centres.
Bolted rather than welded rungs, so spacing can be reset at site and individual rungs replaced without cutting the run apart.
Supplied in SS304 and SS316 where washdown, process chemistry or chloride exposure rules out a zinc coating.
Wall and structure brackets sized to carry the tray and the cable load above it, in matching material and finish.
The fittings that make a run continuous: bends, risers, reducers, tees, crosses, coupler plates and clamps, all in the tray's own grade.
A starting point for tray selection by application. Final selection follows your cable schedule, fill ratio and support spacing.
| Sector and belt | Typical tray | Usual finish |
|---|---|---|
| Petrochemical and refinery Haldia | Ladder tray on pipe racks, perforated for field instruments | SS316 in process areas, hot dip galvanized on racks |
| Steel and heavy engineering Durgapur, Asansol, Howrah | Ladder tray for furnace and mill power | Hot dip galvanized |
| Port and container handling Kolkata Port, Haldia Dock | Ladder tray on quay and outdoor structures | SS316 quayside, hot dip galvanized inland |
| Pharmaceutical Kalyani, Barasat | Stainless perforated tray in classified areas | SS304; SS316 given delta humidity and chloride |
| Commercial and institutional Kolkata city, Rajarhat | Light and medium duty perforated tray in shafts | Powder coated over galvanized base |
Kolkata and Haldia is a coastal environment. Airborne chloride is the governing factor here, not rainfall, and it changes the finish decision completely compared with an inland site.
Where the boundaries fall is a Kolkata and Haldia-specific judgement rather than a general rule. Distance from the water is the variable that matters most, and it changes fast — a plant two kilometres inland can often drop a grade against one on the shoreline. Across a site at Haldia, Durgapur or Dankuni that usually means the tray schedule is split into two or three finish bands rather than quoted at a single grade, and the saving on the lower band normally pays for the upgrade on the higher one.
Pre-galvanized sheet to IS 277 is generally not enough on its own near the shore. It is acceptable only for runs well inside a sealed, air-conditioned building, and even then the cut edges are the first thing to go.
Hot dip galvanizing to IS 2629 and IS 4759 is the sensible baseline for Kolkata and Haldia. Applied after fabrication, it puts a heavier and more uniform zinc layer over welds and cut edges, which is exactly where chloride attack starts.
On Kolkata and Haldia projects specifically, the runs that get under-specified are almost always the semi-outdoor ones — covered walkways, plant rooms with louvres, loading aprons. They read as indoor on the drawing and behave as outdoor in practice. It is worth walking the route on the drawing zone by zone before the order goes in — on a petrochemical and refineryhaldia job around Haldia or Durgapur, that exercise usually changes two or three line items and costs nothing at enquiry stage.
Powder coating should never be applied over bare steel in Kolkata and Haldia. Once moisture gets behind the film at a scratch, corrosion spreads under the coating unseen. Over a galvanized base it is fine, and it is the usual choice for exposed runs in commercial interiors.
| Raw material | Mild steel, stainless steel (SS304 / SS316), aluminium |
| Finish options | Pre-galvanized, hot dip galvanized, powder coated, self-finish |
| Length | 2500 mm – 3000 mm standard; 1000 mm – 3000 mm available |
| Width | 50 mm – 1200 mm (tray); up to 2000 mm on supports |
| Height / side rail | 15 mm – 150 mm |
| Thickness | 1.2 mm – 3 mm |
| Bend | 15 mm – 25 mm |
| Strength class | Light, medium and heavy duty |
| Accessories | Horizontal and vertical bends, reducers, tee and cross sections, coupler plates, clamps, wall mounted supports |
| Supply capacity | 1500 – 2000 metres per week |
| Packing | Loose, nested or in sets as per site requirement |
Tray in India is normally specified to IS 14927 — Part 1 for general requirements, Part 2 for trays and ladder systems including load class and span — with IEC 61537 cited as the international equivalent on multinational projects. Galvanizing is called out as IS 277 for pre-galvanized sheet or IS 2629 and IS 4759 for hot dip. Confirm all three at enquiry stage: standard, load class and support spacing. They have to agree with each other, and settling that before the order costs nothing.
Our works at MIDC Additional Ambernath is 4 to 5 days by road from Kolkata and Haldia. Deliveries run to Haldia, Durgapur, Asansol, Howrah, Kalyani, Taratala, Dankuni. Trays are bundled and strapped for site handling, and accessories can be packed separately by zone where a project is erected in phases. For larger site packages we can stage dispatch against your erection schedule rather than delivering the full quantity at once.
Share the tray layout or bill of quantities with sizes, finish and accessories. You get back a line-by-line quotation with dispatch timing.
Request a Quotation Call +91-251-2621925Yes. Our works is at MIDC Additional Ambernath, Thane, 4 to 5 days by road from Kolkata and Haldia, and we dispatch to all its industrial belts including Haldia, Durgapur, Asansol, Howrah, Kalyani. Trays are supplied in standard 2500 mm and 3000 mm lengths, bundled and strapped for site handling.
Hot dip galvanized to IS 2629 is the practical baseline for Kolkata and Haldia because the coating covers welds and cut edges, which is where chloride attack begins. Close to the water, or in plants drawing marine air through ventilation, SS316 is the right specification rather than SS304. Pre-galvanized tray should be restricted to sealed indoor runs.
Usually not within the salt-spray band. SS304 handles washdown and cleaning chemistry well but pits under chloride exposure. SS316 contains molybdenum, which is what resists chloride pitting, so it is the grade to specify for genuinely coastal installations.
Quantity and finish drive it. Hot dip galvanizing is an extra processing stage after fabrication, and stainless is made to order, so both take longer than pre-galvanized. Share the bill of quantities and the dispatch date is confirmed alongside the quotation.
Yes, against the standard your specification names. IS 14927 Part 2 is the usual Indian reference and IEC 61537 the international one. We need the load class and the support spacing from the drawing as well, because the three have to be consistent.
50 mm to 1200 mm width, 15 mm to 150 mm side rail height, 1.2 mm to 3 mm thickness and 2500 mm or 3000 mm standard length, in light, medium and heavy duty, with supports to 2000 mm. Non-standard sizes are made to order from your drawing.

