Features: 1) ERW galvanized steel pipes:    a) Standards: BS1387-1985, DIN2440/2441 and ASTM A53    b) Used for low pressure liquid delivery such as water, gas, and oil2) BTC (thread and coupling) steel pipe: DN15-DN200 (NB1/2"-NB8")3) BPE (plain end) steel pipe: DN15-DN200 (NB1/2"-NB8")