Pre-treatment

The inner surface of the lining equipment is degreased with solvents and dried, followed by sandblasting with 46# steel grit. The surface that has been sandblasted is then cleaned with trichloroethylene and dried.

Surface paint treatment

Section 3: Adhesive Coatings

A layer of special adhesive is evenly coated on the inside surface of the product, and a layer of adhesive is also applied to the back of the composite board. Then, align the positions and affix the composite board.

Four, stickiness

After aligning the adhesive-coated composite panels, affix them in place first. Then, apply local heat and roll to expel air trapped in between, ensuring a closer fit for the 3mm or 4mm polytetrafluoroethylene sheets.

Five: Weld Seam

Once the composite panels are fully bonded, use a professional notching machine to create "V" shaped long grooves at the junction of the two panels, and clean out any impurities in the gaps.

Welding

Utilize imported high-temperature welding torches with Φ3.5mm PFA welding rods. Weld the two composite panels together in the center of the grooved seam, ensuring no impurities, bubbles, or incomplete welds. After the overall welding is complete, use a pinhole tester to test with 15,000 volts to check for any microholes and make necessary repairs. Upon completion of the inspection, flatten any protruding welding rods on the composite panel's top surface using an imported groove planer. Then, reinforce the original welding rods with a 20mm-wide welding strip to ensure a secure and bubble-free weld. Finally, test for pinholes with a 30,000-volt voltage after welding is finished to further confirm the welding quality.

Section 7: Inspection