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The dimensions of the trapezoidal groove do not match those of the steel ring – what should be done?

2019-06-16View Original

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Dear experts, according to the HG/T-20615 standard, the dimension of the trapezoidal groove on the ring connection flange (RJ) is 469.9 mm, while the groove dimension of the control valves supplied by the manufacturer is 465 mm; as a result, the steel ring cannot be installed. The pipe class is 600BL. Is there any good solution?

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