There are best quality concrete pump wedge clamp coupling for Concrete Pump Pipeline, this kind of wedge clamp coupling always have 5″,6″ and 7″ size, that is DN125/DN150/DN180 size. Also have forged clamp coupling and precision casted clamp coupling, this kind of plug clamp coupling is schwing brand, we exported this clamp to India schwing. DN125 wedge clamp coupling with 166mm FM flange, DN150 wedge clamp coupling with 195mm FM flange . size is standard.Working pressure is 130bar, burst pressure is 220bar. Concrete pump adjustable clamp coupling, concrete pump quick