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External line-up clamps are essential tools for pipe jointing at special working conditions during pipeline construction, widely used in pipe connection, pipeline combination and pipe fittings installation. Even since a long time ago, the external line-up clamps are basically imported from abroad or imitated, has not form original technology in China. The leading companies that manufacture external line-up clamps are VIEZ in Germany, CRC in United States. etc.
The external line-up clamps seem simple, but in fact, in order to satisfy the thousands times of fitting operation on site, the production process for the screw-rod, stressed part , must be in a high level. The external line-up clamps we developed are easy operating with high precision and high performance-price ratio, the welding quality and construction efficiency are greatly improved. The actual unfitness of butt joint is below 1.5mm, our external line-up clamps comply with the technical standards of the “Code for Construction and Acceptance of Field Equipment, Industrial Pipe Welding Engineering” (GB50236-98), it reach the technical specification of the same product in abroad.
The distinctive features of the external line-up clamps are of high matching accuracy, unfitness of butt joint is below 2mm, easy operation, single diameter designing, no adjustment. The sectional adjustment mechanism is for adjustment of high low effect, it is convenient, reliable, light and easy to carry. Our external line-up clamps are highly appreciated by constructors as it reduced the working load and improved the construction quality. The WD series external line-up clamps are suitable for jointing of 2”-80” carbon steel pipe.