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在传热条件下测定冷却水的腐蚀和污染倾向的标准试验方法  
 【英文标准名称】  Standard Test Method for Determination of Corrosion and Fouling Tendency of Cooling Water Under Heat Transfer Conditions
 【原文标准名称】  在传热条件下测定冷却水的腐蚀和污染倾向的标准试验方法
 【标准号】  ASTM D4778-2005
 【标准状态】  Active
 【国别】  
 【发布日期】  2005
 【实施或试行日期】  
 【发布单位】  美国材料与试验协会(US-ASTM)
 【起草单位】  D19.03
 【标准类型】  (Test Method)
 【标准水平】  ()
 【中文主题词】  冷却系统;腐蚀;污染;试验;水
 【英文主题词】  cooling water; corrosion; deposits; fouling; heat transfer
 【摘要】  

Deposits on heat transfer surfaces reduce efficiency of the heat exchanger affected. A method for easily determining the corrosion and fouling tendency of a particular water under heat transfer conditions will allow the evaluation of changes in the various system variables such as heat flux, flow velocity, metallurgy, cycles-of-concentration, and treatment schemes on heat exchanger performance.


Note8212;All pipe is threaded 1 in. (25 mm) PVC. Heater should be fused and grounded in accordance with local electrical codes.

FIG. 1 Test Apparatus and Parts List


Parts List:
(1) test specimen (6) acrylic tube, 10 in. (25 cm) long by 1 in. (25 mm)
outside Diameter
(2) tube fitting; nylon (no metal parts) (7) Cartridge type heater (not shown)
(3) reduci ng bushing, PVC
(4) tee, 1 in. (25 mm) PVC
(5) tube fitting, 1 in. (25 mm) tube by 1 in.
(25 mm) male pipe thread stainless steel
FIG. 2 Test Assembly and Parts List

1.1 This test method provides directions for fabricating and operating a test apparatus to simultaneously monitor the corrosion and fouling tendency of real and pilot cooling water systems under heat transfer conditions.

1.2 Interpretation of the results of this test method must be left to the investigator. Many variables are involved which may not be easily controlled or fully understood. Variations in design and operating conditions may produce results that are not comparable from unit to unit.

1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information only.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

 【中国标准分类号】  Z16
 【国际标准分类号】  13_060_60
 【页数】  5P.;A4
 【正文语种】  
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