Hangzhou WanYun Precision Cold-drawn Steel Pipe Co.,Ltd is specialized in producing cold-drawn and cold-rolled seamless steel pipes. Our products can be used for bearing, construction, fluid conveyance, high / medium / low pressure boiler, ect. We can supply GB, ASME, JIS, DIN, EN series seamless steel pipe. We sincerely hope to cooperate with enterprises from all over the world.