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

77.140 - Sản phẩm sắt và thép
77.140.65 - Dây thép, cáp thép và xích thép
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.