Pre-treatment

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

Surface Paint Treatment

Section 3: Adhesive Coating

The product is evenly coated with a special adhesive inside, and the back of the composite board is also coated with adhesive, followed by positioning and attaching the board accordingly.

Four, Paste

After aligning the adhesive-coated composite panels in their designated positions, apply them first. Then, use local heating and rolling to expel the air trapped in between, ensuring a tighter fit for the 3mm or 4mm polytetrafluoroethylene sheets.

Section 5: Weld Seam

Once the composite boards are fully bonded, use a professional notching machine to cut "V" shaped long grooves at the joint between the two boards, and clean out any impurities from the gaps.

Welding

Utilize imported high-temperature welding torches with Φ3.5mm PFA welding rods. Weld the two composite panels together in the middle of the grooved seam, ensuring there are no impurities, bubbles, or incomplete welds. After the overall welding is completed, use a pinhole tester to test at 15,000 volts to check for any micro-pores 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 micro-pores. Finally, test for pinholes using 30,000 volts to further confirm the welding integrity.

Section 7: Inspection