Shenyang Qiangyun Color Steel & Steel Structure Co., Ltd. is one of the most reliable manufacturers and suppliers of sandwich panel pu wall in China. With abundant experience, we are committed to providing high quality customized products with competitive price. Welcome to wholesale advanced sandwich panel pu wall in stock here from our factory. Also, pricelist is available.

Depth and Fire Duty

Depth is chosen on fire resistance and insulation together. Where the wall is a rated compartment or an escape corridor, 100 mm and above is usual and the required resistance period governs the build-up; 50 mm serves general external walls carrying no rated duty; 150-200 mm is used where a temperature band must be held as well. The core is rock wool throughout - EPS is not used in this product.

Technical Data

Parameter	Value
Designation	Sandwich Panel PU Wall
Facing material	PPGI or PPGL pre-painted coil, hot-dip zinc-coated sheet, or aluminium
Core type	Vertical-fibre rock wool, Class A, with foamed polyurethane edges
Panel depth	50, 75, 100, 120, 150, 200 mm
Facing thickness	0.3-0.8 mm
Module width	960 mm or 1,000 mm
Supplied length	To the site schedule, longest 11.8 m
Rock wool density	100-120 kg per cubic metre for the core; 38-43 for the edge foam
Thermal conductivity	0.036-0.040 W/(m.K) for the core; 0.022-0.024 W/(m.K) at the foamed edge
Absorption by volume	1.5% or less at the sealed edge
Fire performance	Core non-combustible to Class A; the foamed edge is B1 and does not sustain flaming
Brand	QY
Country of origin	Liaoning, China

Declared Performance

Property	Declared value
Reaction to fire	Core A class to GB 8624; system B-s1,d0 to EN 13501-1, with no flaming droplets and little smoke
Lambda, core	0.036-0.040 W/(m.K)
Edge foam density	38-43 kg per cubic metre
Water absorption	1.5% maximum; the sealed edge stops water wicking into the core
Compressive strength	150 kPa or better, confirmed by the batch test report
Design life	15-25 years in ordinary exposure
Edge joint	Tongue and groove, with a foamed seal and mechanical fixing

Surface Material & Coating system Facing options

Option	Comment
Pre-painted galvanised or galvalume coil	Default facing on rated walls
Hot-dip zinc-coated sheet	Chosen on humid and coastal projects
Aluminium facing	Used where weight or chemical exposure governs
Coating	UV stable, corrosion resistant and non-chalking

Finish Options

White, light grey, sky blue and terracotta are stocked and the whole RAL chart can be matched. On a rated wall the coating is specified alongside the fire test evidence, so any change of colour is checked against the classification rather than applied on its own.

Fire-Rated Applications

Specified wherever the wall has a job beyond keeping the weather out: compartment walls between storage cells, enclosures along escape corridors, boundaries between industrial and office areas, furnace and plant rooms, and the external walls of buildings that must maintain a separation distance. The foamed edge matters here - a rated wall is only as good as its weakest junction, and a sealed tongue-and-groove removes the joint as that weak point.

Project

A chemicals distribution warehouse near Rotterdam, the Netherlands, was built in 2021 with 7,800 m2 of 100 mm rock wool cored wall board. Dutch rules required rated compartment walls between the storage cells and along the escape route, which ruled out a foam-cored panel outright. The foamed edge detail was accepted by the authority on the strength of the test file, the compartments were signed off with no modification, and the client has since repeated the build-up on two further units.

Customization & OEM Service

Rated walls are specified differently in every market, so the build-up is assembled against your national standard and the evidence that supports it, not copied across from another country. Flat and lightly profiled faces are both available, depth and length are made to the schedule, and coil and rock wool are held in stock so a repeat order matches the first one exactly.

Packing and Dispatch

Boards are filmed, corner-protected and strapped to fumigated pallets, then hooded and shrink-wrapped for the sea leg. Rock wool cored panels weigh more per square metre than foam cored ones, so loading plans are drawn against payload rather than volume. FOB, CIF and DDP are all quoted.

Compliance and Evidence

On a rated wall the paperwork decides whether the build is accepted. We hold ISO 9001, 14001, 45001 and 50001, buy coated coil to EN standards with mill traceability, and supply the classification report, the test file and the declaration of performance that a building control officer will ask to see.

Manufacturing Strength & Quality Control

Experience: sixteen years of export production, including a long run of fire-rated work in regulated markets.
Plant: the rock wool is laid, the skins are roll-formed and bonded, the edges are foamed and cured, and the board is cut, trimmed and filmed - all on one line, with no handling in between.
Inputs: rock wool density, coil coating weight and foam chemicals are checked on delivery and logged against the batch.
Testing: bond strength, edge fill and face flatness are sampled per batch, and the results sit behind the declaration of performance.
Service: one team handles specification, quotation, the certification file and the shipping documents.

Lead Time, MOQ & Trade Terms

Item	Detail
Lead Time	Stocked depths 7-10 working days from deposit. Rated build-ups and non-standard depths 10-15 working days; samples 3-5 working days.
Minimum order	Small batches accepted - a single compartment can be supplied for testing.
Delivery	FOB, CIF or DDP, named on the quotation.
Payment	Telegraphic transfer, letter of credit or ex-works, confirmed per order.
Packing	Filmed faces, corner guards, pallets and stretch wrap, loaded to a drawn plan.

Technical Support

Detailing advice is given before the order, including how the rated build-up should be fixed and sealed so the classification survives on site. During production you get progress photographs and the test file; after delivery, installation guidance and a named contact who answers within a working day.

Company Profile & Call to Action

Tell us the resistance period your wall has to achieve and we will come back with a build-up, the evidence behind it and a price. The works has run since 2010, 15,000 m2 of it, at about 20,000 m2 a day.