Tiêu chuẩn quốc tế
Số hiệu
Standard Number
ASTM A640-97(2019)
Năm ban hành 2019
Publication date
Tình trạng
A - Còn hiệu lực
Status |
Tên tiếng Anh
Title in English Standard Specification for Zinc-Coated Steel Strand for Messenger Support of Figure 8 Cable
|
Chỉ số phân loại Quốc tế (ICS)
By field |
Số trang
Page 3
Giá:
Price Liên hệ / Contact us
|
Phạm vi áp dụng
Scope of standard 1.1 This specification covers two sizes of extra-high-strength grade of concentric-lay steel wire strand, composed of seven, zinc-coated steel wires, specifically intended for use as the supporting messenger in Figure 8-type communication and electrical cables. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
|