Mobile Welding Curtains UK: Buyer’s Guide to Portable Frames, Wheeled Screens & Modular Bays

Written by: PVC Strip Curtains UK Technical Team  ·  Last updated: October 2026

Mobile welding curtains are freestanding, portable safety barriers engineered with heavy-duty tubular steel frames, swivel castors, and EN ISO 25980-certified PVC strips or screens. They protect UK workshop personnel from hazardous optical radiation, weld spatter, and flash burn, providing versatile, modular hot work enclosures for dynamic industrial fabrication environments.

What Are Mobile Welding Curtains and Portable Screens?

Mobile welding curtains are self-supporting workshop partitions designed to isolate welding, gouging, and grinding operations without the need for permanent structural steelwork or overhead tracks. In high-output fabrication shops and repair facilities, workpieces are often too large to fit into fixed cubicles, requiring safety measures to be brought directly to the job. A complete portable welding unit consists of three primary elements: a rigid frame, heavy-duty castors, and optical radiation-absorbing PVC infills.

Anatomy of a Portable Welding Screen

Understanding the mechanical construction of a portable screen ensures you specify the right system for your shop floor demands:

• Tubular Steel Frame: Fabricated from 25mm to 35mm circular or box-section mild steel, typically coated in a durable, non-reflective powder-coat finish. This prevents arc flash reflections from bouncing off the structure itself. Frames are designed in standard spans (typically 1.8m x 1.8m or 2.0m x 2.0m) and utilize click-lock pins or heavy bolts for rapid workshop deployment.
• Mobility Hardware: Industrial screens sit on four swivel castor wheels, with at least two incorporating positive foot-locking brakes. Wheel diameters typically range from 50mm for smooth indoor screeds up to 100mm heavy-duty polyurethane or solid rubber wheels suited for pitted concrete and transition plates.
• Protective PVC Infills: The barrier material suspended within the frame consists either of hanging strip curtains (overlapping PVC strips suspended from a top hook-on system) or a tensioned single-sheet PVC curtain secured through brass eyelets via heavy-duty elastic ties or steel split rings.
• Modular Linkage Arms: Most mobile frames incorporate pivot pins or dual-ended clamp brackets. These allow single units to join together, creating 2-sided L-shapes, 3-sided C-frames, or fully enclosed 4-sided temporary hot work enclosures.

Strip Curtains vs. Solid Sheet Screens

When selecting your infill, you must choose between overlapping strip packs and single continuous sheet panels:

• Strip Curtains (100mm to 300mm widths): Ideal when long pipes, structural RSJs, or tooling must protrude beyond the boundary of the screen, or where welders must pass in and out of the enclosure without moving the frame. Strips part easily and drop back into position, maintaining an optical barrier.
• Solid PVC Sheets: Suited for dedicated isolation where draughts must be eliminated to prevent shielding gas disruption during high-precision TIG (GTAW) or automated MIG (GMAW) operations. Single sheets present a flat, seamless face that simplifies wipe-down maintenance.

Key Benefits and UK Industry Applications

Under the Health and Safety at Work etc. Act 1974 and the Control of Artificial Optical Radiation at Work Regulations 2010, UK employers are legally required to assess and mitigate risks from non-ionising radiation. Arc welding processes generate intense artificial optical radiation—specifically actinic ultraviolet (UV) radiation (200nm to 315nm) and visible blue light (400nm to 780nm)—which cause photokeratitis ("arc eye") and irreversible retinal burns. High-quality welding curtains provide an engineered control measure that allows nearby personnel to work safely without specialised secondary eye protection.

Manufacturing and Heavy Structural Engineering

In structural steel yards across the UK, fabricators regularly assemble large framework assemblies, trusses, and bridge components. Moving multi-tonne assemblies into fixed welding booths is practically impossible. Mobile welding curtains allow fabrication teams to wheel compliant safety zones around the workpiece, containing weld spatter, sparks from 9-inch angle grinders, and high-amperage arc light while overhead gantry cranes operate unhindered above.

Automotive Bodyshops and Commercial Fleet Maintenance

Vehicle repair workshops and municipal transport depots require flexible workspace allocation. A bay may host mechanical engine maintenance in the morning and chassis welding in the afternoon. Portable wheeled screens allow technicians to partition off commercial vehicles or chassis rigs instantly, safeguarding neighbouring mechanics, autolack painters, and MOT testers from hazardous flashes.

Aerospace and Precision Engineering

Precision aerospace welding often utilizes high-frequency AC/DC TIG setups on titanium, Inconel, and aluminium. These high-frequency arcs emit high-intensity shortwave UV radiation. Enclosing these delicate processes within mobile bays not only protects adjacent clean assembly lines from blinding flash, but also shelters the weld puddle from cross-draughts caused by factory roller doors or high-volume extraction units.

Logistics Hubs and Plant Depots

Forklift workshops within distribution centres frequently carry out hot work, such as mast repairs, chassis seam repairs, and pallet rack rectification. Mobile curtains provide rapid cordon capabilities, ensuring that warehousing operatives moving inventory on nearby thoroughfares are completely shielded from arc radiation and hot debris.

Technical Specifications & Safety Standards

Not all tinted PVC is suitable for welding containment. Standard coloured plastic will rapidly degrade, discolor, or catch fire when exposed to continuous welding arcs. Compliant industrial screens must conform strictly to BS EN ISO 25980:2014 (Health and safety in welding and allied processes — Transparent welding curtains, strips and screens for arc welding processes), which superseded the older British and European standard EN 1598.

Core Engineering Criteria Under BS EN ISO 25980:2014

• Spectral Transmittance: The PVC formulation must filter out hazardous UV radiation (below 400nm) to less than 0.002% transmission, while selectively reducing blue light hazard transmittance to safe levels based on welding amperage.
• Luminous Transmittance: The material must allow enough visible light through (typically between 1% and 12%) so that supervisors and passers-by can observe the operator inside the enclosure. This visual access is vital for lone-worker safety, enabling immediate detection of a fallen operative, clothing fires, or thermal runaway.
• Reflectance: The curtain surface must exhibit low specular reflectance (under 10%) between 230nm and 400nm to prevent arc light from reflecting back out into the workshop.
• Fire Retardancy: The PVC material must be self-extinguishing. Under testing, when a flame or hot spatter source is removed, the curtain material must cease burning within 3 seconds, and the charred length must not exceed 50mm.
• Thermal Stability and UV Ageing: The polymer is blended with specialized chemical UV absorbers and plasticisers designed to operate consistently across typical British workshop ambient ranges, usually -15°C to +50°C, resisting embrittlement, cracking, and hardening under prolonged exposure to ultraviolet rays.

Specification Attribute	Strip Formulation	Solid Sheet Formulation
Available Widths	200mm, 300mm	1400mm to 1800mm (Continuous)
Material Thickness	2.0mm, 3.0mm	0.4mm to 1.0mm
Standard Screen Dimensions	1.8m x 1.8m / 2.0m x 2.0m	1.8m x 1.8m / 2.0m x 2.0m
Operating Temperature	-15°C to +50°C	-15°C to +50°C
Fire Test Compliance	BS EN ISO 25980 / DIN 53438	BS EN ISO 25980 / DIN 53438
Recommended Overlap	33% (1 hole) to 66% (2 holes)	N/A (Seamless continuous surface)

Optical Tints: Colour Selection Guide

The colour of certified welding curtains is not a decorative preference; it determines optical density, visible light transmission, and process suitability:

• Amber / Red (Translucent): Offers the highest visible light transmission (approx. 10–12%). Ideal for low- to medium-amperage processes like precision TIG welding and light MIG fabrication. It provides exceptional visibility into the workspace, maximising natural light transfer within dimly lit industrial units while filtering harmful radiation.
• Bronze (Translucent): An excellent all-rounder with moderate visible light transmission (approx. 5–7%). The warm bronze hue minimizes glare and optical strain for operators situated just outside the screen. Highly recommended for general fabrication shops operating mixed MIG, MMA, and flux-cored setups up to 300 amps.
• Dark Green (Translucent): Designed for heavy fabrication, high-amperage MIG, and plasma cutting operations up to 500 amps. With visible transmission restricted to roughly 1–3%, it completely eliminates disorienting arc glare for personnel working nearby, while still permitting safety silhouette viewing.
• Matt Green / Opaque Green: Completely opaque with 0% visible transmission. This grade is reserved for automated robotic cells or heavy air carbon arc gouging where zero flash breakout can be tolerated, and where internal visibility is monitored via CCTV rather than direct human line-of-sight.

How to Choose: Portable Frames vs. Wheeled Screens vs. Modular Bays

Selecting the optimal portable welding infrastructure depends on factory traffic, process amperage, airflow conditions, and floor topography. Use the following decision matrix to evaluate your options.

1. Single Mobile Screen (Freestanding Single Panel)

A single 1.8m x 1.8m or 2.0m x 2.0m screen on castors is the most cost-effective solution for small independent maintenance shops or educational colleges. It is lightweight, fits through standard domestic internal double doorways, and can be wheeled by one person to shield an open walkway while maintenance tacking takes place. However, a single screen only shields radiation from a single direction, leaving 180 degrees of workshop space exposed to peripheral flash bounce.

2. Multi-Panel Wheeled Screens (Hinged 2-Piece or 3-Piece Units)

Hinged screens feature a wide central panel (e.g., 2.0m) supported by two outrigger arms (e.g., 1.0m each) on pivoting castors. This configuration folds inwards to create an instant U-shaped or semi-circular bay around the operative. When the job is complete, the outriggers fold flush against the main frame, allowing compact storage against a workshop perimeter wall. It is the gold standard for mid-sized sub-contract fabrication shops.

3. Modular Interlocking Bays

If you manage a large production plant requiring scalable hot work facilities, choose modular screen systems with standardised interlocking pins. These units allow you to link five, ten, or twenty individual wheeled panels to form completely enclosed cubicles, extended partition walls, or dedicated inspection tunnels. If your layout shifts to accommodate new CNC press brakes or laser cutters, the bay can be disassembled and reconfigured in minutes without drilling into the factory slab.

Key Hardware Evaluation Checklist

• Castor Construction: Ensure the frame utilises heavy-duty castors fitted with steel roller bearings and non-marking rubber or polyurethane treads. Plastic nylon wheels will rapidly crack and lock up when traversing concrete control joints and metal swarf.
• Clearance from Floor: Under BS EN ISO 25980, the gap between the underside of the curtain and the finished floor level must be carefully controlled. A gap of 150mm to 200mm is standard to facilitate adequate bottom-level air displacement for local exhaust ventilation (LEV) systems while keeping weld spatter and optical glare contained within the booth boundary.
• Strip Thickness Selection: If you are moving sharp steel box sections, angle iron, or stillages continuously through the partition, standard 0.4mm sheet PVC will tear. Specify 2mm or 3mm thick PVC strips, which can absorb mechanical impacts and withstand repetitive friction from jagged raw material ends.

Assembly, Configuration and Maintenance Guide

Correct mechanical assembly and regular maintenance are critical for safety compliance and ensuring your mobile welding screens withstand aggressive industrial environments.

Step-by-Step Frame Assembly

1. Unpack and Inspect: Lay out the tubular steel components on a clean, level concrete floor. Ensure all click-lock pins, clamping bolts, castor inserts, and curtain suspension hooks are accounted for.
2. Mount the Castor Assemblies: Thread the swivel castor stems into the bottom base outriggers. Secure them using the provided zinc-plated lock washers and locking nuts. Tighten with a spanner until completely seated against the frame foot. Ensure the brake mechanisms operate freely and lock securely against the tyre tread.
3. Assemble Vertical and Cross Rails: Slot the vertical uprights into the base outriggers. Connect the top and bottom horizontal crossbars. If using snap-lock push buttons, ensure each brass or steel detent pin clicks fully into its locating hole. For bolt-together designs, torque bolts to standard manufacturer settings (typically 25–30 Nm).
4. Install the PVC Infills:
   • For Strip Curtains: Bolt the stainless steel or galvanised hook-on track to the top horizontal crossbar. Hang the pre-clamped 200mm or 300mm PVC strips onto the track, ensuring the correct face-to-back overlap configuration (e.g., 33% or 50% overlap). Verify that the concave/convex curvature of adjacent strips nests together tightly to prevent gaps through which optical radiation could escape.
   • For Solid Sheets: Insert the supplied bungee ties, steel cable ties, or split rings through the brass eyelets pre-punched into the curtain perimeter. Fasten them progressively around the top, bottom, and side frame rails. Tighten the ties evenly to maintain uniform tension across the face of the screen without overstretching the eyelet grommets.
5. Function and Clearance Check: Disengage all castor brakes and roll the screen across the floor to verify smooth tracking. Lock the brakes and apply firm horizontal hand pressure to check for structural rigidity and frame stability.

Maintenance and Service Life Care

Welding curtains operate in arduous environments exposed to abrasive grinding grit, iron oxide dust, oily fumes, and high-velocity spatter droplets. To maximise the service life of your protective screens:

• Wipe Down Regularly: Do not use harsh industrial solvents, acetone, or aggressive thinners on PVC screens; chemical solvents leach out plasticisers and UV-blocking agents, causing the PVC to turn opaque, brittle, and yellow. Clean screens using lukewarm water, a neutral industrial detergent, and a soft microfibre cloth.
• Inspect for Heat and Mechanical Damage: Periodically check curtains for severe pitting, burn-through holes, or tears. Any perforation larger than 5mm compromises optical containment, allowing dangerous actinic UV radiation to leak out into the open workshop. Damaged individual strips should be unhooked and replaced immediately.
• Castor Servicing: Clear away wire cuttings, strapping bands, and swarf coiled around castor axles monthly. Apply a light squirt of maintenance lubricant to the swivel ball races to maintain effortless maneuvering.

Frequently Asked Questions

What is the difference between BS EN ISO 25980 and standard industrial PVC?

Standard clear or coloured industrial PVC only offers physical weatherproofing, dust control, and thermal insulation; it provides minimal attenuation against shortwave UV and actinic blue light radiation. Certified BS EN ISO 25980 welding curtains contain specialized chemical UV absorbents and heat-resistant plasticisers that block 99.998% of harmful UV rays, control hazardous visible glare, and feature certified self-extinguishing fire-retardant properties to prevent hot spatter from igniting the material.

Can mobile welding curtains be used outdoors on UK industrial yards?

Yes, but environmental wind loading must be factored in. In open outdoor areas, solid sheet screens can act like sails in UK coastal or winter gales, tipping the frame over. For external yard applications, use heavy strip curtain configurations that allow wind to pass between the strips, fit larger 100mm rubber castors, and weigh down the base outriggers with dedicated sandbag ballast or steel counterweights.

Which colour welding curtain should I specify for mixed MIG and TIG processes?

Bronze or Red/Amber are generally recommended for mixed-process fabrication shops. Bronze offers exceptional glare attenuation for medium-to-high amperage MIG welding while maintaining sufficient translucency to monitor the operative inside. Amber/Red excels at low-amperage TIG welding, offering high internal visibility and ambient light transmission while blocking dangerous ultraviolet radiation.

How do overlap percentages affect protection on strip-type mobile welding screens?

Overlap percentages determine both the optical seal and draught containment of the screen. A 33% overlap (one hook spacing) provides basic spatter and flash containment for light assembly work. For heavy-duty MIG welding, arc gouging, or drafty workshops near open bay doors, specify a 50% or 66% overlap. This ensures that even when workpieces or cables push through the screen, adjacent strips remain nested, preventing direct line-of-sight arc breakout.

When should welding curtains be replaced due to workshop wear?

Welding curtains must be replaced when they sustain physical burn-through holes, develop severe spatter pitting that completely obscures through-vision, or experience plasticiser migration that leaves the PVC rigid, milky, or cracked. In standard UK medium-fabrication environments, premium-grade PVC strips typically deliver a service life of 2 to 4 years before optical degradation warrants individual strip or panel replacement.

To configure compliant portable hot work protection for your workshop floor, explore our comprehensive range of industrial PVC strip curtains, order fully tailored configurations via our made to measure PVC strip curtains service, or browse our reinforced heavy duty PVC strip curtains for aggressive fabrication and structural steel environments.