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1) Locally-quarried raw materials are accurately blended before being ground to a fine form to enable subsequent extrusion. |
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2) Clay raw material is mixed with water to give plasticity for extrusion. High-pressure extrusion ensures that a strong dense pipe body is produced.
Close attention to drying to remove moisture is undertaken prior to firing under accurate temperature control. |
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3) Use of special highly-insulated kilns is employed for attaining accurate firing. |
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4) The special qualities of vitrification of the pipe body are attained at a firing temperature in excess of 1050oc. |
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5) After the firing and subsequent grading processes the pipe ends are accurately machined with computer-controlled diamond profile cutters. Accurate production of parallel ends is also achieved. |
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6) Intermediate inspection takes place as well as pipe ends being pressure tested to ensure integrity of pipe material. The joint components are then applied and materials are packed for shipment. |
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