Products:  carbon steel seamless pipe

Steel grade: GB/T 8162/8163 #20 ASTM A106 GR.B, ASTM A53 GR.B, API 5L PSL1 GR.B,X42,X56,X60, GOST 8731-74 ST20

Standard: GB/T8163, ASTM A106, ASTM A53, API 5L, GOST 8731-74