... With the neck butt weld ring set of flange loose 8. Flat welded loop loose set of flange 9. Ring groove surface ... stock :Company profile: Our company is a professional manufacturer of stainless steel round pipe, square pipe, rectangular pipe, embossed pipe and ... focus on science, technology and produce various specifications stainless steel pipe. The pipe of steel grade: 201,202,301,304,316,316L, ...