PPs Beige Flame Retardant Sheet Material

Product Model	PPs-M Series (Thickness 2–60mm)
Category	PP-PPs Sheets
Reference Price	Price on request

Hot Customizable for Working Conditions 10 Technical Parameters

Product Overview

The beige flame-retardant PPs sheets are engineering plastic sheets extruded from flame-retardant polypropylene, named for their beige color. Beige is a traditional color long used in the corrosion-resistant equipment manufacturing industry and is widely applied in the processing of spray towers, washing towers, and ventilation pipes. The surface color of the sheets is soft, and welding marks are not obvious, ensuring a clean and uniform appearance of the finished product.

The sheets have a low density and are lightweight, making them easy to handle and install on-site. The material itself is non-toxic and odorless, meeting the requirements of environmental engineering. Beige PPs flame-retardant sheets combine heat resistance and impact resistance, maintaining good mechanical strength within the range of ambient to medium temperatures. They do not crack under slight impacts, making them suitable for various processing methods such as coiling, bending, and welding in workshops.

The beige PPs flame-retardant sheets supplied by Xicheng Environmental Protection are available in thicknesses ranging continuously from 2mm to 60mm. Thin sheets are used for coiling air ducts and processing fittings, while thick sheets are used for welding tower bodies and tanks. The sheets can be cut to customer-specified dimensions and are also available with matching beige flame-retardant welding rods to ensure that the weld color and performance match the base material.

Working Principle

The flame-retardant mechanism of beige PPs sheets is the same as that of white PPs sheets, which involves altering the combustion reaction process of the polypropylene base material by adding flame-retardant components. When exposed to fire, the surface of the sheets quickly carbonizes to form a barrier layer, inhibiting the transfer of heat and oxygen inward while reducing the release of flammable gases. The material extinguishes itself after leaving the fire source without continued combustion.

Beige does not alter the material's corrosion resistance principle. Polypropylene is a crystalline polymer with no reactive groups in its molecular structure that are easily susceptible to acid-base reactions. It exhibits chemical stability against common inorganic acids, alkalis, and salt solutions. When waste gases and liquids contact the inner wall of the sheets, they do not cause electrochemical corrosion, and the sheets do not rust or thin like carbon steel. Therefore, they are extensively used in corrosive environments such as chemical fibers, caustic soda, dyes, and wastewater treatment.

Structural Composition

The beige PPs sheets have a homogeneous structure throughout, with the same material from the surface to the core, without surface coatings or bonded layers. The cross-section is uniformly colored, free of bubbles and delamination. The extrusion molding process ensures the density along the thickness direction of the sheets, resulting in neat cutting edges, minimal springback when coiling, and full filling of weld puddles during welding.

When supplied, the sheet surfaces are protected with a film to prevent scratches during handling and processing. They are categorized into thin sheets, medium sheets, and thick sheets. Thin sheets are supplied in rolls or sheets for coiling pipes, while medium and thick sheets are provided as flat plates for welding cylinder bodies and wall panels. The color difference within the same batch of sheets is small, ensuring good appearance consistency when welding large areas.

Specification Model Table

The table below shows the conventional thickness ranges and processing applications of beige PPs flame-retardant sheets. Specific dimensions can be cut to order.

Thickness Range	Typical Application	Supply Form
2–5mm	Round air ducts, elbows, and fittings	Rolls or sheets
6–14mm	Tower bodies, equipment casings	Flat plates
15–30mm	Storage tank wall panels, water tank bodies	Flat plates
30–60mm	Base flanges, load-bearing components	Flat plates

Product Features

The beige PPs flame-retardant sheets are a classic material in the corrosion-resistant equipment industry, balancing processing performance and safety. Key features include:

Beige appearance, with inconspicuous welds, ensuring an aesthetically pleasing overall finish for equipment
Flame-retardant and self-extinguishing, suitable for equipment in indoor and high-traffic areas
High corrosion resistance to various acids, alkalis, and salt media, making it highly suitable for chemical and wastewater environments
Low density and lightweight, simplifying coiling, welding, and hoisting during construction
Non-toxic and odorless, suitable for auxiliary applications in food and pharmaceutical industries
Continuous thickness specifications, with matching same-color welding rods to ensure consistent welds
Cuttable and recyclable, with scrap material suitable for secondary processing and utilization

Material	Flame Retardant Polypropylene (PPs)
Sheet Color	Light Khaki
Thickness range	2–60mm
Molding Process	Extrusion Molding Extrusion molding is a manufacturing process used to create objects of a fixed cross-sectional profile. The process
Flame Retardancy	Self-extinguishing
Corrosion resistance performance	Acid and Alkali Salt Resistant
Odor	Non-toxic and odorless
Welding method	Hot melt welding
Companion Welding Electrodes	Beige Flame-Retardant Welding Electrode
Supply Method	Full sheet or cut-to-size

Application Industries

Manufacturing of acid-alkali exhaust ventilation pipelines in spinning workshops of chemical fiber enterprises
Collecting equipment shells for hydrochloric acid mist and alkali mist in chlor-alkali processes
Corrosion-resistant reaction tail gas absorption towers for dye and pesticide production
Production of odor-sealed covers and ventilation ducts for wastewater treatment plants
Slot linings and exhaust structures for metallurgical pickling lines
Corrosion-resistant fume hoods and exhaust pipelines for food and pharmaceutical workshops
Corrosion-resistant enclosure panels for surface treatment lines in light industry

Typical Process Locations

The beige PP sheets are cut, bent, and welded at the equipment manufacturing plant to form ventilation ducts, towers, and tanks, which are then transported to the site for installation. The sheets serve as the wall materials for these equipment, determining their corrosion resistance lifespan and structural strength. Their flame retardancy is particularly critical when the equipment is installed indoors, on ceilings, or near production lines.

In the complete exhaust gas treatment process, the beige sheets are used to manufacture ventilation ducts that connect the workshop hood at the front end, run along supports in the middle section, and are Series wind valves and silencers, with the end connected to a spray tower or adsorption equipment. The sheets are exposed to corrosive gases from the collection end to the emission end, and their corrosion resistance and flame retardancy directly impact the operational safety of the entire system. Before cutting, the thickness and flame retardancy grade markings of the sheets should be verified. Bending and welding should be performed on flat workbenches to avoid surface scratches and forced deformation. Finished equipment should be properly covered during transportation and storage to prevent surface aging and discoloration due to prolonged sun exposure. Incoming materials should be batched and retained with material certificates for quality traceability and subsequent acceptance.

Two-color PP flame-retardant sheet materials share the same basic raw materials and production processes. Prices primarily fluctuate with thickness, purchase volume, and market raw material conditions, with color itself typically not constituting a significant price difference. Beige is the industry's traditional color, with substantial market inventory, resulting in shorter delivery cycles for standard thicknesses. Porcelain white sheets are mostly produced based on orders, and small-batch purchases may involve slight variations in price and lead time. When inquiring, provide thickness, dimensions, and quantity to receive corresponding quotes. For large-volume purchases, custom-cutting can be negotiated to reduce edge waste and improve material utilization. If both colors meet the appearance requirements, prioritize the readily available beige for more reliable supply and replenishment.

From the perspective of welding strength and corrosion resistance, porcelain white welding electrodes of the same material can be used to weld beige panels. Both the electrode and the base material are polypropylene, and after hot melt fusion, the mechanical properties and corrosion resistance of the weld are unaffected. However, when porcelain white welding electrodes are applied to beige panels, they form distinct light-colored welds with a strong color contrast, affecting the overall consistency of the equipment's appearance. For equipment with high aesthetic requirements and exposed welds, it is recommended to use matching beige flame-retardant welding electrodes, as the weld color closely matches the base material, resulting in a harmonious and aesthetically pleasing finish. If welding is required in internal or concealed areas of the equipment, color difference is not an issue, and porcelain white electrodes can also be used. When purchasing, ensure to match the welding electrodes with the panel color and leave additional allowance for re-welding to avoid noticeable color differences later.

PPs sheets should be stored on flat and solid ground or shelves, ensuring even distribution of weight to prevent localized suspension that may cause long-term bending and deformation of the sheets. Thick sheets should be placed flat and stack height controlled to avoid compression and warping of lower layers. Storage environment should be away from open flames and high-temperature heat sources, maintaining dryness and ventilation to prevent surface aging, discoloration, and performance degradation due to prolonged sun exposure. The protective film on the sheet surface should be removed before processing to minimize scratches and contamination during handling and cutting. Sheets should not be stored with oil stains, solvents, or sharp metals. During handling, lift and place gently to avoid dragging. In winter, when low temperatures reduce the material's toughness, sheets should be warmed indoors before bending or coiling to minimize the risk of brittleness.

PPs sheets are inherently non-toxic and odorless, with polypropylene being one of the commonly used food-contact materials; however, flame-retardant grade sheets contain flame-retardant additives, and whether they meet specific food-contact scenario compliance requirements depends on reviewing the corresponding batch test reports and applicable standards. For tanks and containers directly contacting food materials, it is recommended to select pure PP sheets explicitly labeled as food grade; flame-retardant PPs sheets are more suitable for applications such as exhaust emission, ventilation, and peripheral corrosion where they do not directly contact food.

When the width of a single plate is insufficient for large-diameter tower bodies and wide-section ducts, multiple plates need to be spliced and welded before rolling; proper splicing adopts double-sided welding or groove welding, ensuring thorough fusion of the electrode with the base material, followed by leak detection after welding; qualified splices exhibit equal strength to the base material and are leak-proof, with key equipment also capable of adding reinforcing strips outside the welds; splicing quality depends on groove preparation, welding temperature, and welder operation, making it effective to select a manufacturer with processing experience to avoid potential leakage hazards.

Visually, the appearance difference between flame-retardant PP boards and ordinary PP boards is minimal. The reliable way to determine is to check the flame-retardant test report and material certification provided by the manufacturer, which will indicate the flame-retardant grade and testing standards. Alternatively, a simple ignition test can be conducted using edge trim. Flame-retardant boards will self-extinguish after being removed from the heat source, while ordinary PP boards will continue to burn and drip molten material. When the project officially commences, both the flame-retardant test report and material certification should be obtained and retained. Confirmation should be made by combining the edge trim ignition test. Only boards that self-extinguish after being removed from the heat source and have complete documentation may be processed.

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