IPP Cooling Water Program
Open recirculating cooling-water chemistry for Pakistani IPPs and utility power stations — biocide rotation, multi-metal corrosion control, scaling management on one accountable program.
The accountability we write into every program contract.
SLA, lead-time guarantee, technical-support response, chemistry governance, reorder cadence, escalation path. The Charter is what makes a program a program — not just a recurring PO for the same drums.
3 chemistries, one supply chain.
Every SKU below is on the AAS-Shaanxi Ande catalogue, stocked in Karachi for the contracted volume window, and reviewed quarterly against the KPI targets below. Click any product for the full TDS and dosing programme.
| SKU | Dosing range | Feed point | Monitoring parameter | Supply frequency |
|---|---|---|---|---|
| AD-401 Non-Oxidizing Fungicide for Circulating Cooling Water |
50–150 ppm shock; 25–50 ppm continuous when running non-oxidiser-dominant | Cooling-tower basin, alternating with AD-402 in 3–7 day rotation | HPC < 10⁴ CFU/mL, ATP < 100 RLU, SRB negative on monthly culture | Quarterly delivery, drums; ex-Karachi stock |
| AD-402 Recirculating Cooling Water Non-Oxidizing Fungicide |
30–100 ppm shock; 10–30 ppm continuous (CMIT/MIT) | Cooling-tower basin, alternating with AD-401 | HPC, ATP, Legionella quarterly PCR; visible biofilm on coupon | Quarterly delivery, drums |
| AD-303 Circulating Cooling Water Corrosion Inhibitor |
80–200 ppm as product, slug-fed | Continuous slug to cooling-tower basin | Mild-steel corrosion ≤ 3 mpy on D2776 coupon; molybdate residual 5–10 ppm; tolyltriazole 0.5–1.5 ppm for yellow metals | Monthly delivery, drums |
Lab analysis of KW&SB / well-water makeup, LSI / RSI / S&DSI calculation, recommended cycles of concentration target, and metallurgy review (admiralty brass vs all-carbon-steel condensers).
Dosing skid design and fabrication where one is needed — solenoid metering pumps, ORP control loop on oxidiser, calibration columns, and side-stream filtration tie-in.
Monthly dosing-pump and instrumentation walk-down, quarterly coupon retrieval and residual testing, annual programme review against corrosion-rate and biofilm KPIs.
Ex-Karachi stock on AD-401, AD-402, AD-303 — same-week dispatch. PKR invoicing available via AAS to offload FX risk on multi-year contracts.
Real plants on this chemistry.
Anonymised but real. Drawn from the AAS project list — the chemistry, the KPIs, the dose ranges, the failure modes corrected. Names available under NDA.
Continuous chemistry supply on the program SKUs, quarterly KPI audit, dosing calibration. Best fit for facilities already operating with stable chemistry needing accountability.
One-time design and commissioning capex, followed by a 24-month operating retainer at Tier 1 rates. Best fit for new installations, plant retrofits, or chemistry-program rebuilds.
Hourly engineering on troubleshoot, plus access to program SKU supply on per-shipment pricing. Best fit for plants under another vendor’s chemistry needing second-opinion or emergency response.
Pricing bands aren’t published — each program is sized to plant flow rate, SKU mix, metallurgy, and feedwater profile. Submit a Program Proposal request; Rayhan replies with a Charter draft (SLA, KPI targets, BoM, indicative pricing band) within 3 business days.
1. Vendor consolidation.
SKU purchasing fragments the supply chain across three or four vendors per duty — one for each chemistry class, plus the dosing-skid contractor. Each shrugs when the others’ work doesn’t hold. A program collapses that to one accountable vendor with one phone number, one invoice, one engineer on the line.
2. Supply continuity SLA.
Spot purchasing exposes the plant to lead-time risk on every reorder. The program holds buffer stock in Karachi for the contracted SKU range, runs scheduled bulk replenishment from Shaanxi Ande, and commits to a delivery cadence in writing. Predictability is the deliverable, not just chemistry.
3. Chemistry KPI accountability.
SKU sales land at the dose tank. The program lands at the KPI: COD reduction, cycles, corrosion rate, RO flux decline, sludge dry-solids. The Charter writes the KPI target into the contract; we review it quarterly; if the chemistry isn’t holding we tune the dose or escalate to Shaanxi Ande — the procurement officer doesn’t have to chase three vendors to find out whose chemistry slipped.
Every program SKU is sourced through AAS’s sole-agent relationship with Shaanxi Ande Technology Industry (China) and Innovative Water Technology & Solution (Pakistan). That’s a single legal entity at both ends: Karachi office, dosing skid, WhatsApp engineering line, and Shaanxi factory books — no trader in the middle, no second hand-off.
Operationally that means: COA per batch on factory letterhead, lot-traceable; MSDS pre-shipment so the plant HSE team clears documentation before the drums land; 4–8 week lead times on factory-direct bulk replenishment (21–35 days CIF Karachi on standard SKUs); and PKR invoicing available on multi-year contracts to offload FX exposure.
Before you sign with anyone — score them.
10 questions every buyer should ask a chemistry supplier. ISO, COA, MSDS, backup, lead-time, RM origin, sample, payment, support, audit. Interactive scorecard with a printable PDF.
Send us your facility profile.
Three minutes of intake → a Program Charter draft sent within 3 business days. The draft includes SLA, KPI targets, indicative BoM, and a pricing band. From there we converge on the final program over one or two calls.