All kinds of pipe products have DIN, ISO, 3A, SMS, BS, IDF, DS, BPE standard. And pipe fitting: 45¡ã/90¡ã/180¡ãbend series, tee/cross series, concentric(eccentric) series make your pipeline system free connectivity. Each series pipe fittings have weld, clamp, thread and flange four common install ways with your pipe system standard connections.