Shandong Lede Machinery (山东乐德机械) casts and machines ductile iron grooved couplings, fittings and valves for fire protection, HVAC and industrial pipework at a foundry in Weifang. Its LEDE and PREM rigid and flexible couplings hold LPCB certificate 1433a to LPS 1219 Issue 3.1, the LPCB standard for sprinkler pipe couplings, in sizes DN25 to DN200 at twenty bar working pressure, and it holds UL file EX26457 under CCN HLXS for fire-protection valves. It is a straightforward source where EN 12845 pipework calls for third-party-certified couplings.