Pre-treatment

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

II. Bottom Paint Treatment

Section 3: Adhesive Coating

Apply a uniform layer of special adhesive to the inside surface of the product, and also coat the back side of the composite board with adhesive. Then, align and affix the composite board in place.

Four, Paste

After aligning the adhesive-coated composite panels in their corresponding positions, apply them first. Then, use localized heating and rolling to expel air trapped between the layers, ensuring a tighter fit for the 3mm or 4mm PTFE sheeting.

Section 5: Weld Seam

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

Welding

Utilize imported high-temperature welding torch with Φ3.5mm PFA welding rods. Weld the two composite panels together in the middle of the grooved seam, ensuring no impurities, bubbles, or incomplete welds. After the overall welding is completed, use a pinhole tester to test for 15,000 volts to check for any microholes and make necessary repairs. Upon completion of the inspection, use an imported grooving machine to flatten any protruding welding rods on the composite panel. Then, reinforce the original welding rods with a 20mm-wide welding strip to ensure the welds are secure and free of microholes. Finally, test for pinholes using 30,000 volts to further confirm the welding quality.

Section 7: Inspection