Yosun (Tianjin) Piping Engineering Co., Ltd. is one of the most credible manufacturers and suppliers of welded pipe in China. Please feel free to wholesale customized welded pipe at competitive price from our factory. If you have any enquiry about quotation, please feel free to email us.
Impact test
1.The test shall be carried out in accordance with EN 10045-1 at the temperature given in Table 4.
2.The mean value of the three test pieces shall meet the requirement given in Table 4.One individual value may be below the specified value,provided that it is not less than 70% of that value.
3.If the width (W) of the test piece is less than 10 mm,the measured impact energy (KV P) shall be converted to impact energy(KV C) using the following equation:
KVC=10XKVP/W
Where:
-KVC is the calculated impact energy,in J;
-KVP is the measured impact energy,in J;
-W is the width of the test piece,in mm.
-The calculated impact energy KVC shall conform to the requirements given in 11.5.2.
Hydrostatic leak tightness test
The hydrostatic leak-tightness test shall be carried out at a test pressure of 70 bar 2) or at a test pressure P calculated using the following equation,whichever is lower:
P=20 SXT/D (4)
Where:
-P is the test pressure,in bar;
-D is the specified outside diameter,in mm;
-T is the specified wall thickness,in mm;
S is the stress,in MPa,corresponding to 70% of the specified minimum yield strength (see Table 4) for the steel grade concerned.
The test pressure shall be held for not less than 5 s for tubes with an outside diameter D less than or equal to 457 mm and for not less than 10 s for tubes with an outside diameter D greater than 457 mm.
The tube shall the test without showing leakage or visible deformation.
Note:This hydrostatic leak-tightness test is not a strength test.
Option 12: A test pressure different from that specified in 11.6 and correspinding to stress below 90% of the specified minimum yidld strength ( see Table 4) for the steel grades concerned is specified.
Hot Tags: welded pipe, China welded pipe manufacturers, suppliers, cs pipe, Carbon Steel Pipe for Pressure Testing, Carbon Steel Pipe for Mining Equipment, Electric Fusion Welded Steel Pipe, Carbon Steel Pipe for Ductwork, Carbon Steel Pipe for Industrial Insulation
