Heqiang PEF insulation · material and installation-system brief

Separate tube fit, flat sheets and accessory products

For pipe insulation, give actual pipe outside diameter, thickness and the fitting/support schedule; do not use nominal pipe size alone as the inner-diameter requirement. For duct sheets, state area, sheet/roll width and length, thickness, facing and edge/joint details. For adhesive-backed work, identify the substrate and required backing adhesive.

The 2015 text interleaves Ø15–1020 mm and 20–100 mm thickness entries with 1000×2000 mm sheets and 10–100 mm thickness. It does not clearly assign all values to item632. Request a current size and tolerance schedule for the exact form rather than merging those entries into one universal catalogue.

Choose thickness from service conditions, not a catalogue photograph

For cold-service design, provide fluid/surface temperature, ambient temperature and humidity, geometry and required surface condition. For heat-loss design, state the operating temperature and allowed loss or surface-temperature requirement. Ask for the insulation calculation and the material conductivity at the relevant mean temperature.

The general historical conductivity entry has an unclear unit and no test conditions. It cannot support a reliable thickness recommendation by itself. This page does not prescribe a universal thickness or claim that the pictured rolls prevent condensation in every environment. Require a current verified design basis and the manufacturer’s continuous-service limits.

Review current material and fire evidence for the finished construction

The 2015 article lists oxygen index ≥27, water absorption ≤1%, rebound 90% and other general properties. It does not supply the test reports or conditions for item632. Oxygen-index wording is not a complete project reaction-to-fire classification, and water absorption does not establish water-vapour performance or sealed-system continuity.

Obtain the required test reports for the actual foam formulation, thickness, facing and adhesive. Check the sample description, method, conditioning, result and limits of application. General antibacterial, mould-resistant, antistatic or environmental wording should likewise be supported by the specific evidence needed for the project.

Seal joints and manage supports as part of the system

Heqiang’s historical installation article emphasises sealing joins/cuts with dedicated glue and bonding at insulation ends. It does not identify the adhesive product, cure/application conditions or a complete joint/support standard. Ask for current installation details and compatible glue/tape rather than substituting any available adhesive.

Approve dry/clean substrate preparation, edge closure, fitting and termination details, and supports without an uncontrolled break in the insulation system. Confirm storage/application conditions and how installed seams are inspected. A facing or backing adhesive cannot compensate for an open joint; the actual supplied instructions and project specification must govern installation.

The patent publication is not the pictured roll’s approval

Original invention grant publication CN115353681B names Heqiang and describes a particular flame-retardant material/preparation method, with experimental examples. The official qualification image separately shows two utility-model certificates. Neither identifies item632’s current delivered composition or provides its thermal/fire classification.

If the supplier proposes a patented grade, ask for its exact grade name, composition-control statement and current applicable product reports. Do not transfer experimental values from the invention document into the sales specification of a visually similar roll. Patent ownership and product compliance are separate enquiries.

Make the sample and delivery requirements measurable

The source does not establish a fixed price, MOQ, current manufacturing lead time or warranty duration. Define the quantity in the correct unit—roll, sheet, tube length or insulation area—with dimensions and accessories stated. Agree thickness/density/dimensional tolerances and sample acceptance before production.

1. Approve the design basis

   Close service temperatures, ambient/humidity, geometry, required insulation performance and selected material construction.

2. Approve sample and documentation

   Check foam/facing/backing, dimensions/tolerances and the matching technical/test/install information.

3. Accept traceable material

   Require lot/grade identification, quantities, protected packing, storage instructions and written defect-remedy terms; control formulation/facing changes.