List each component and its water-treatment stage before ordering HDPE or polypropylene (PP) sheet. A tank liner, baffle, cover and dosing tray can contact different media and carry different loads. Specify them by drawing or part number rather than using one generic water-treatment sheet requirement.
Send us the part list, drawings and service data for each component. We review the requested sheet or processing scope before quotation. Identify who is responsible for system design and component approval. Our HDPE and PP equipment selection guide covers the material shortlist.
Record the water stream and operating conditions
| Process input | Information to record |
|---|---|
| Water stream | Process stage, stream composition and whether the water is raw, treated, potable, brine, wastewater or sludge |
| Chemicals | Named chemicals, normal and maximum concentrations, mixtures and relevant composition data; pH is additional information |
| Temperature | Minimum, normal and peak temperatures, including dosing, cleaning and shutdown |
| Contact conditions | Contact mode and duration: immersed, intermittent, splash, vapor or condensate |
| Cleaning | Cleaning product, concentration, temperature, pressure, duration and frequency |
| Mechanical duty | Liquid head, pressure/vacuum, span, vibration, impact and maintenance load |
| Environment | Indoor/outdoor, UV, ambient range and nearby heat sources |
| Compliance | Destination market, drinking-water or food-contact duty and required project documentation |
Screen the proposed grade against the actual medium, concentration, temperature, contact time and stress. The name process water or a pH value is not a complete compatibility basis. A chart rating does not approve a tank, liner or welded assembly.
Specify each component separately
| Component | Main design questions | RFQ details |
|---|---|---|
| Self-supporting tank wall | Liquid head, temperature, creep, reinforcement, weld design and nozzle loads | Controlled tank drawing, medium, dimensions, design basis and required sheet or part supply scope |
| Liner over a structure | Backing condition, attachment, thermal movement, seams and leak path | Backing/substrate specification, lining area, fixings, seam and termination drawings, and inspection access |
| Baffle or divider | Flow load, span, perforations, support and vibration | Panel drawing, holes, mounting, flow and cleaning |
| Cover or guard | Deflection, access, hinges, fixings and any specified personnel or safety load | Drawing, unsupported span, allowed loads, removable sections and edge details |
| Chemical dosing tray | Spill composition and concentration, temperature, retention duration and required containment volume | Tray drawing, joints, outlets and required inspection; agree who performs any leak test |
| Hood or duct component | Gas and condensate composition, temperature, supports and applicable fire requirements | Gas/condensate data, part and joint drawings, supports and ventilation design responsibility |
| Machined spacer or bracket | Continuous load, fit, creep, temperature and chemical splash | Drawing number and revision, grade, fit tolerances and inspection features |
Identify whether the part carries load, lines an existing structure or provides a cover or protective function. A liner does not replace the supporting structure, and a cover is not walkable unless the complete assembly has been designed and approved for that duty.
Tank and liner design responsibilities
Assign tank and load-bearing component design to the responsible qualified designer. Review geometry, liquid head, any pressure or vacuum, temperature, sustained load, joints and supports together. Published sheet properties or a maximum temperature figure do not establish a complete design basis, and a sheet quotation is not approval of the equipment.
For a liner, include the backing surface, preparation, fixing or proposed bonding method, edges, penetrations, seams and inspection access. Confirm that the substrate, attachment and joint design suit the service and can accommodate movement. Sheet compatibility alone does not approve the complete lining.
Welding specification and quality controls
- Confirm that the sheet and any welding material are compatible with the specified process.
- Define joint type, preparation, weld location and access.
- Agree preparation, process controls and operator qualification for the selected welding procedure.
- State visual acceptance and any mechanical test requirements.
- Provide a weld map or joint identification where traceability is needed.
- Agree any required leak or hydrostatic testing, including medium, duration, acceptance criteria and the responsible party.
- Record repair, retest and documentation requirements within the agreed supply scope.
The responsible designer should specify applicable fabrication rules and acceptance criteria. Agree which joints, checks and records are included in the quoted parts, and which are carried out by the equipment builder or installer. Weld appearance alone does not demonstrate strength or leak-tightness.
Include chemical dosing, spills and cleaning in the service data
Describe exposures at the chemical-storage, dosing and injection stages separately from the diluted water stream. Include incoming chemical concentrations, foreseeable dosing variations, spills, stagnant contact and cleaning or temperature changes. Review each affected part for its actual medium and duration, not only the normal treatment-water specification.
For a proprietary treatment product, provide its name, relevant safety data sheet and available composition information. Identify the actual chlorine-based product or other oxidizer rather than writing only chlorine, acid or alkali. A pH value or an SDS alone is not application-compatibility evidence.
Drinking-water contact and project documents
State the destination market, water-contact duty, temperature and required approval or standard in your request. Check that any available document covers the actual offered sheet grade, formulation, color and use conditions. Certification of a material or component does not automatically certify the completed equipment. Confirm the required documentation and its availability before ordering; the names HDPE and PP alone do not establish drinking-water suitability.
Send a controlled drawing and part list
- Process stage and service data for each component
- Specified grade, or the conditions needed for a material shortlist
- General arrangement, part numbers, drawing numbers and revisions
- Sheet thickness, color, surface and quantity
- Supports, reinforcement, penetrations and connection details
- Weld specification, map and acceptance criteria
- Critical dimensions, tolerances and inspection plan
- Required material declarations, inspection records and identification; confirm availability at quotation
- Part labels, packing order, installation sequence and delivery destination
For processed parts, send the drawing revision, inspection features and quantity by part number. Our HDPE and PP fabrication guide explains these drawing and tolerance inputs. Agree any first article and its acceptance points within the quotation.
Water-treatment sheet and component RFQ checklist
| System | Process stage, stream composition, installation location and required service life |
|---|---|
| Medium | Normal and maximum media concentrations, mixtures, pH, cleaning and dosing variations |
| Temperature/load | Normal/peak temperatures, sustained load, liquid head, pressure/vacuum and supports |
| Component | Part drawing and sheet-only, cut-part or fabricated-part supply request |
| Material | Specified or proposed grade, thickness, color, finish and required documents |
| Fabrication | Requested processes, controlled drawing, joints, tolerances and inspection responsibility |
| Quantity | Trial or first article if required, quantity by part number, spares and repeat demand |
| Delivery | Part labels, packing, agreed trade terms, destination and required date |
We supply industrial HDPE sheets and PP-H sheets, with drawing-based processing reviewed against your component specification. Agree the offered material, dimensions, tolerances, processing, inspection records and documents in the quotation. The supply scope should state whether you are ordering sheet, cut blanks or fabricated parts.
Frequently asked questions
Does every water-treatment component need the same sheet grade?
Not necessarily. A wetted baffle, cover and chemical-dosing tray may have different media, temperatures, loads and contact requirements. Record those duties against each part number before choosing the grade and fabrication route.
Can sheet thickness be selected from tank volume only?
No. The design also depends on shape, liquid head, temperature, sustained load, joints, openings, reinforcement and supports. Ask the responsible designer to define the required thickness and acceptance basis; tank volume alone is not a sheet specification.
Do you need the cleaning process for a quote?
Yes. Send the cleaning products, concentrations, temperatures, contact duration and frequency for each affected part. Cleaning or disinfectant exposure may differ from normal water duty and must be included in the grade and joint review.
Request a water-treatment sheet quotation: Send your water-treatment component requirements. Include the stream and dosing data, component drawings or sheet dimensions, quantity, inspection scope and destination.
