公路设施 永久性路标 塑料里程牌：特点，性能与试验

表 1：非反射表面的比色性能

3.3. 塑料材料的机械性能

3.3.1. 未用玻璃纤维强化的材料

按照标准 NF T 51-034，在（23±3）℃的温度下，以 10 毫米/分钟的速度，对里程碑上切下的 ISO 类型的试件做牵拉-延伸试验后进行测量，软化点的拉应力和延伸率分别应该至少等于 15 MPa 及 15%。

3.3.2. 玻璃纤维强化的材料

按照标准 NF T 57-101，在（23±3）℃的温度下，以 2 毫米/分钟的速度，对里程碑上切下的 ISO 类型的试件做牵拉-延伸试验后进行测量：

• 抗拉应力最低延伸率应该等于 60 MPa；
• 相切的弹性模量最低应该等于 4 000Mpa。

3.3.3. 抗热强度

按照 4.3 节中所描述的方法做完抗热强度试验后，里程碑的几何尺寸性能的变化率不应该等于或超出±1%。

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SOMMAIRE

TABLE DES MATIÈRES

:current

Foreword

This document (EN 10216-3:2002) has been prepared by Technical Committee EC/TC 29, "Steel tubes and fittings for steel tubes", the secretariat of which is held by UNI.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2002, and conflicting national standards shall be withdrawn at the latest by November 2002.

This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.

Other Parts of EN 10216 are:

Another European Standard series covering tubes for pressure purposes is:

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.

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ISO 657-1 : 1988 (E)

Table 1 — Dimensions and sectional properties of hot-rolled equal-leg angles (concluded)

NOTES

1. Member countries may choose, to be included in their national standards, the sizes which are required to meet their demand.
2. For the angles so chosen, only thicknesses which can be rolled in their mills to meet the demand of the users may be selected from the list of thicknesses corresponding to equal angles in table 1.
3. The sectional area has been calculated using the formula

   S = [l/2 A - l) + 0,214 6 (r_root² - 2r_toe²)] × 1/100

   where
   

   S is the sectional area, in square centimetres;
   

   l is the thickness, in millimetres;
   

   r_root is the root radius, in millimetres;
   

   r_toe is the toe radius, in millimetres;
   

   A is the leg length, in millimetres.

4. Mass is calculated on the basis of density of steel of 7,85 kg/dm³.

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