Retractable Industrial Painting Booth

CASE STUDY · COATTECH PROJECTS-Dated Sep 22,2026

Retractable Industrial Painting Booth

15 × 7 × 6 m | Engineered for a European Steel Structure Manufacturer

From a 30-point RFQ to a modular, budget-aligned solution

Project at a glance

An established European steel-structure manufacturer approached us with a highly detailed, 30-point technical specification — a complete retractable industrial painting system, not a basic tent. This case study walks through how we decoded the spec, identified the real compliance risks, and turned it into a modular, budget-aligned configuration that any industrial buyer can adapt to their own site.

1. The Client's Starting Point

The inquiry did not arrive as a casual price check. It came as a fully written technical specification — the kind of document usually produced for a formal tender. The buyer listed, point by point, what the complete system had to include: retractable steel structure and enclosure, supply and exhaust air, multistage filtration, VOC treatment, full climate control, ATEX-compliant electricals, complete PLC/HMI automation, and a full English documentation package.

What made this RFQ stand out was not the length, but the precision. The client asked for guaranteed ventilation data (total supply/exhaust airflow in m³/h, internal air velocity in m/s, air changes per hour, pressure balance concept, clean and dirty filter pressure drop, fan static pressure and motor power, noise levels). They asked for filter class, efficiency, service life, replacement interval and replacement cost — for every single filtration stage.

2. Decoding the Specification

A complete painting system is not one product — it is six subsystems that have to agree with each other. We grouped the client's requirements into the six workstreams below, then worked out what each one actually demands.

3. The Three Questions That Decide Everything

Before any number goes on paper, three inputs have to be fixed. Get these wrong and the whole system is either over-engineered or non-compliant. We made these the first three questions in our reply.

1. The coating specification — What is actually being sprayed?Without the product name, TDS and SDS for every coating, thinner and cleaning agent, the VOC load cannot be calculated. Flash point, solvent content, kg of coating and kg of solvent per shift, and duty hours per day: these numbers decide the size of the VOC treatment stage and the ATEX zone.
2. The local environmental limit — A guaranteed outlet concentration in mg/Nm³ is a function of the local operating permit, not of the equipment alone. We commit to design airflow, capture efficiency and the specification of the treatment device; the measured value at handover is verified against the buyer's local limit by an independent party.
3. The site and utility data — Outdoor design temperature and humidity range, altitude, voltage/phase/frequency, available electrical power, gas type and calorific value, compressed air, water quality and drainage. Heating power, cooling capacity and dehumidifier size are all calculated from these inputs.

4. The Compliance Backbone: CE & ATEX

This is where most suppliers either over-promise or go silent. Both responses lose the project. The correct position is precise, and it must be stated in writing early.

On CE marking:

• For the integrated machine/system, the contracting supplier acts as the manufacturer of the assembly and issues the EU Declaration of Conformity for the complete system, with the CE marking placed accordingly.
• The technical file is established, kept available for the prescribed period, and held by an EU-based Authorised Representative. It includes the risk assessment of the complete system, applicable harmonised standards, GA drawings, electrical and control documentation, and component declarations of conformity.

On ATEX (2014/34/EU):

• There is no such thing as an “ATEX certificate for the complete painting booth”. The directive applies to equipment and protective systems intended for potentially explosive atmospheres.
• What is supplied instead: a zone classification proposal for the booth and connected equipment; confirmation of the intended equipment category and zone suitability; ATEX certificates with full Ex marking for every component in the hazardous area; and a complete explosion protection concept / Ex documentation package.
• The control philosophy must prevent unsafe operation in case of fan failure, filter blockage or airflow loss.

5. A Modular Configuration Buyers Can Adapt

The table below is the core of the case study — and the part we recommend every buyer starts from. It separates the non-negotiable base system from the optional modules that can be added as the budget, site and compliance requirements demand.

6. Documentation We Supply in English

One of the most under-rated parts of a painting system is the paper that comes with it. For this project we committed to a complete English documentation package — and the same package travels with every system we deliver.

• Technical datasheets for all main components
• GA drawings, airflow layout, P&ID or equivalent system schematic
• Electrical diagrams, installation / operation / maintenance manuals
• Spare parts list, recommended preventive maintenance schedule
• Risk assessment, EU Declaration of Conformity, ATEX certificates, component declarations of conformity.

7. Division of Responsibility

A clean handover depends on one thing: knowing who is responsible for what. We state this explicitly in every quotation.

8. What Buyers in the Middle East, Africa & Southeast Asia Should Take From This

Not every buyer needs the full European compliance package — and paying for it when you don't is money removed from the parts of the system that actually improve your painting. The questions below are the same ones we used on this project, and they work for any site.

1. Coating system — What coating system are you using, and is it solvent-borne or water-borne?
2. Local emission limit — What are your local emission limits, if any, and who sets them?
3. Climatic extremes — What are your outdoor temperature and humidity extremes, and your altitude?
4. Available utilities — What power, gas, water and compressed-air supplies are available at the site?
5. Workpiece & duty — What are your maximum workpiece dimensions, weight, and duty hours?
6. Certification target — Do you require third-party certification, or national-standard compliance only?

9. Key Takeaways

• A detailed RFQ is a gift, not a burden. It tells you exactly what the buyer values — answer it point by point.
• Ventilation guarantees (airflow, air velocity, air changes, pressure drop) are the technical core. Quote them.
• CE marking and ATEX are real, document-based commitments — never promise what the supply chain cannot deliver.
• Modularity is the bridge between a European-grade specification and an emerging-market budget.
• The division of responsibility must be in writing before the price is discussed.

Ready to scope your own painting system?

Send us your workpiece size, coating specification and local conditions — we will come back with a modular configuration and a priced scope of supply.