Shanghai Rongyin Special Alloy Co.,Ltd was founded in 2002.Manufacturing flanges,pipe fittings and other alloyed casting.12 years producing experience bring us long-term,fixed customer all over the world.Rich experienced workers makes our products perfect.And our location is the biggest commercial city in China--Shanghai.You can feel free to contact us and visit our factory in Shanghai.Best products and nice serving is waiting for you!Wechat:ryalloy-bingoSkype:shanghai-alloyTel:86 21 56352979Fax:86 21 56948845Mob:15021556730