Watch this dynamic factory tour of TOBO GROUP, a leading Chinese pipeline products manufacturer since 1998. See how ASTM A234 WPB carbon steel seamless equal tee fittings are produced—from raw material inspection to forging, machining, heat treatment, and nondestructive testing. Learn about their 550,000 sqm facility, 260 workers, and five branch factories supplying global B2B buyers with high-quality pipe fittings, flanges, and valves.