... head forging, valve body forging, tubing spool forging, casing spool forging, API tubing hanger (forging blank&finish machining) with thermal ... forging in China, our product include: Casing head forging, tubing head forging, casing spool forging, tubing spool forging, three- ... forging, valve body forging, double-flange joint forging, locking coupling forging, and so on. Materials are: 4130 4140 1040 ...