EN 10217-7 is a European standard that specifies the technical delivery conditions for welded stainless steel tubes used in pressure applications, particularly for heat exchangers, boilers, and other high –  temperature / pressure environments.

Dimensions of EN 10217-7 Heat Exchanger Tubing

Outside DiameterThickness(mm)
(mm)1.01.21.51.62.02.32.53.03.23.54.05.05.56.06.57.18.09.010.0
10√√
12√√√√
15√√√√√
16√√√√√
17.2√√√√√
18/20√√√√√
21.3√√√√√√√
22√√√√√
25√√√√√√√√
26.9√√√√√√√
28/30√√√√√√√√
31.8/32√√√√√√√√
33.7√√√√√√√√√√
35/38/38.1√√√√√√√√
40√√√√√√√√
42.4√√√√√√√√√√√√
44.5√√√√√√√√
48.3√√√√√√√√√√√
50.8/51√√√√√√√
54/57√√√√√√√
60.3√√√√√√√√√√√
63.5√√√√√√√
70√√√√√√√
76.1√√√√√√√√√√√
88.9/101.6√√√√√√√√√√√√
114.3√√√√√√√√√√√√
139.7√√√√√√√√√
168.3√√√√√√√√√√
219.1√√√√√√√√√√√
273√√√√√√√√√√√√
323.9√√√√√√√√√
355.6√√√√√√√√√
406.4√√√√√√√√
457√√√√√√√√
508√√√√√√√√

EN 10217-7 Grades and AISI Equivalents

Steel NameSteel NumberAISI Grade
X2CrNi18-91.4307304L
X5CrNi18-101.4301304
X2CrNiMo17-12-21.4404316L
X6CrNiTi18-101.4541321
X6CrNiMoTi17-12-21.4571316Ti
X2CrNiMo18-15-41.4438317L
X2CrNiMoN22-5-31.44622205

Application

Stainless steel tubes are widely used in heat exchangers due to their excellent thermal conductivity, corrosion resistance, and durability. Heat exchangers are critical components in industries such as chemical processing, oil and gas, power generation, HVAC, and refrigeration. Stainless steel tubes are particularly favored for their ability to withstand high temperatures, pressure, and corrosive environments.

heat exchanger tube
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