YEUN CHYANG and FROCH are specialized manufacturer for stainless steel tube and pipe. Products are in conformity with CNS, JIS and ASTM standards.

允强及彰源公司都是专业的不锈钢钢管制造商，产品质量符合CNS, JIS及ASTM等国家规范标准。

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Stainless steel tube surface after sand blasting become rough and very evenly, can enhance the paint adhesion layer on the surface of stainless steel pipe.

不锈钢管表面经过喷砂变得粗糙又很均匀，能增强油漆层对不锈钢管表面的附着力。

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But stainless steel tube outer wall and the outer wall of the copper pipe which pipe bead setting more is still unclear, but can say two pipe wall mostly film condensation.

但不锈钢管外壁和铜管外壁哪种管材的珠状凝结更多尚不清楚，但可以说两种管材外壁大部份是膜状凝结。

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