heat exchanger tube

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heat exchanger tube
Posting date : Jun 20, 2014
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72-
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Anhui Tiankang Shares Co., Ltd. (AHTKS) Standards and steel grades, Tube sizes acc. to DIN 28180, Tube sizes acc. to ASTM A179, Tube sizes acc. to BS, NF A, UNI, STN, ?SN, GOST standards, Tube sizes acc. to EN 10216, Tube sizes acc. to JIS. Heat exchanger tubes are made using the cold rolling process and the semi-finished product for these are used rolled steel tubes. Heat exchanger tubes are used in energy and chemical industry for heating the buildings, water etc. The heat exchanger tubes make it possible to transfer thermal energy from one media to another. The heat transfer may be linked with phase transformation of the media. Overview of the dimensional standards and the technical-delivery conditions according to which these tubes are manufactured and supplied is shown in a separate overview. Dimensions of the heat exchanger tube The outside diameter of the heat exchanger tubes ranges from 16 mm to 51 mm according to DIN 28180 and from ? inch (12.7 mm) to 3 inches (76.2 mm) according to ASTM A179 The tubes for the heat exchangers may be supplied also in compliance with other standards starting with 4 mm. Detailed overview is shown in tables and according to BS, NF A, UNI, STN, ?SN, GOST standards, according to EN 10216 and according to JIS standards. Types of steel for heat exchanger tubes Tubes for the heat exchangers are made of the following steels according to EN 10216-2: P235GH, according to DIN 1629: St 37.0, DIN 17175: St35.8, 15Mo3, DIN 17173: TTSt35N and according to ASTM A179. Additional types of steel according to BS 3606, NF A 49-215, UNI 5462, GOST 550, GOST 1060, JIS 3461, JIS 3462, STN 42 0251 and ?SN 42 0251 together with its chemical composition and mechanical properties are shown in a separate overview. Steel is manufactured in electric arc furnace and it is killed. Other types of steel are possible to deliver upon request. Delivery condition and tubes surface of the heat exchanger tube Tubes are supplied according to agreed standards. The cold drawn tubes after the final forming go through thermal processing in shielding gas

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