Galvanized composite steel pipe manufacturing process
A manufacturing process and technology for composite steel pipes, applied in the field of steel pipe manufacturing processes, can solve the problems of high manufacturing cost, complex manufacturing process, unfavorable popularization and application, etc., and achieve the effects of long service life, simple manufacturing process and low production cost
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Embodiment 1
[0013] Embodiment 1: a kind of manufacturing process of galvanized composite steel pipe of the present invention, comprises the following steps: A, first cleaning the outer surface of the stainless steel pipe, then coating the hot-melt adhesive on the outer surface of the stainless steel pipe, wherein the hot-melt adhesive Coating thickness is 0.1mm; B. Insert the stainless steel pipe into the galvanized pipe and seal both ends; C. Pass the pressure saturated steam into the stainless steel pipe and heat the outer surface of the galvanized pipe, wherein the saturated steam pressure introduced is 4MPa, the heating temperature of the outer surface of the galvanized pipe is 120 degrees Celsius.
Embodiment 2
[0014] Embodiment 2: a kind of galvanized clad steel pipe manufacturing process of the present invention, comprises the following steps: A, the outer surface of stainless steel pipe is cleaned earlier, then is coated with hot-melt adhesive on the outer surface of stainless steel pipe, wherein hot-melt adhesive Coating thickness is 0.3 mm; B. Insert the stainless steel pipe into the galvanized pipe and seal both ends; C. Pass pressure saturated steam into the stainless steel pipe and heat the outer surface of the galvanized pipe, wherein the saturated steam pressure introduced is 6MPa, the heating temperature of the outer surface of the galvanized pipe is 160 degrees Celsius.
Embodiment 3
[0015] Embodiment 3: a kind of galvanized clad steel pipe manufacturing process of the present invention, comprises the following steps: A, first cleaning the outer surface of the stainless steel pipe, then coating the hot-melt adhesive on the outer surface of the stainless steel pipe, wherein the hot-melt adhesive Coating thickness is 0.2 mm; B. Insert the stainless steel pipe into the galvanized pipe and seal both ends; C. Pass pressure saturated steam into the stainless steel pipe and heat the outer surface of the galvanized pipe, wherein the saturated steam pressure introduced is 5MPa, the heating temperature of the outer surface of the galvanized pipe is 140 degrees Celsius.
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