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Pre-Bid Engineering

For Water & Wastewater EPCs

Cost-competitive, technically reliable bids

We help water and wastewater EPC companies make their designs and proposals cost-competitive and technically reliable – from design and sizing calculations to drawings, BOQ, client comments and technical deviations.

Water Treatment PlantsEffluent RecyclingZero Liquid DischargeDesalination

Discuss Your Tender+91 956 109 1317

At a glance

01Who We SupportWater & Wastewater EPC Companies
02StageTender & Proposal (Pre-Bid)
03OutcomeCost-competitive, technically reliable bids
04DeliverablesDesign, drawings, datasheets & BOQ

Why Pre-Bid Engineering

Win the right projects – at the right price

The bid stage decides both whether you win a project and whether it stays profitable. We work alongside your proposal team on complex water treatment plants, effluent recycling systems and zero liquid discharge (ZLD) projects.

  • Identify potential technical challenges early
  • Optimize design solutions for cost and performance
  • Submit accurate, cost-effective bids
  • Meet regulatory and environmental guidelines
Tank farm and interconnecting piping – WEEN water treatment plant engineering
Tank farm & interconnecting piping

Scope of Work

What we deliver at the pre-bid stage

A complete, coordinated technical package – so your proposal team can price and submit with confidence.

01

Spec Reading

Detailed review of tender specifications, client requirements and performance guarantees.

02

Water Balance Diagram

Flow and quality balance across every treatment stage of the plant.

03

Sizing Calculations

Process and equipment sizing that is technically sound and cost-competitive.

04

PFD, HFD, P&ID & Layout

Process and hydraulic flow diagrams, P&IDs and preliminary plant layouts.

05

Bought-out Datasheets

Technical datasheets for pumps, blowers, membranes and other bought-out items.

06

Vendor Document Evaluation

Technical evaluation of vendor offers and documents against the specification.

07

Instrument List

Complete instrument list to support accurate scoping and costing.

08

Preparation of BOQ

Accurate bill of quantities so your bid is priced with confidence.

09

Client Comments & Deviations

Resolution of client comments and preparation of technical deviations.

How We Work

From tender specification to bid-ready package

A structured workflow, closely coordinated with your proposal and costing teams.

1

Tender Review

Spec reading and scoping against client requirements.

2

Process Design

Water balance and sizing calculations.

3

Drawings

PFD, HFD, P&ID and layout preparation.

4

Datasheets & Vendors

Bought-out datasheets and vendor evaluation.

5

BOQ & Bid Support

BOQ, client comments and technical deviations.

Applications

Systems we engineer bids for

Pre-bid support across municipal and industrial water and wastewater treatment.

Sea Water Desalination
Sewage Treatment & Recycling
ETP & Recycling
Zero Liquid Discharge (ZLD)
Water Treatment Plants
Demineralization
Condensate Polishing Plants
Physico-chemical Treatment

Why EPC Partners Choose WEEN

Built for global EPC & consultant specifications

1

Engineering core

Our leadership team spent 20+ years at global water majors, engineering to specifications prepared by the world's top consultants and EPCs.

2

Spec-first delivery

We work with international consultants and customers – spec-oriented engineering from day one.

3

End-to-end capability

From pre-bid engineering through detail engineering, 3D modelling and skid fabrication, under one accountable team.

4

Proven on live EPC projects

Delivered Process, Mechanical and E&I engineering for EPCs executing plants in Europe, UAE, Oman and Sri Lanka.

From Bid to Build

The same team carries your project forward

Once the project is won, our pre-bid work flows directly into detail engineering and 3D modelling – no hand-over gaps, no re-work.

WEEN 3D model – integrated process and piping layout
Integrated process & piping layout
WEEN 3D model – process hall with tanks and pipe racks
Process hall with tanks & pipe racks
WEEN 3D model – clarifiers and civil-structural integration
Clarifiers & civil-structural integration

Need a solution?

Our experts are here to help with your next tender.

Share your tender specification with us – we'll help you prepare a cost-competitive, technically reliable bid.

Talk to Our Expertsinfo@weentech.in+91 956 109 1317