... technology, is forged with high-strength alloy steel, strict heat treatment process can ensure that the nipple have uniform metallurgical structure and ... thread, butt-weld and compress-seal. The type mainly consists of: 100#, 200#, 206#, 207#,211#, 400#, 600#, 602#, 1002#, ... , fracturing fluid and mixed fluid . These products are all made of high quality steel by forging and finishing cut .They have ...