ANSI/UL 1777a-2009 标准详情
- 标准号:ANSI/UL 1777a-2009
- 中文标题:烟囱衬壁安全标准
- 英文标题:Standard for Safety for Chimney Liners
- 标准类别:美国国家ANSI
- 发布日期:2009
The following changes in requirements are being proposed: Revisions to the strength requirements of UL 1777 including: specifying that Loading Test for Metallic Chimney Liners, Section 23, does not apply to corrugated liners; reducing loading tests o
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