Blogs – Page 7 – PipingNotes

Note#89

The fluid flow velocities in water systems should not exceed certain limits to avoid noise and damaging wear and tear of pipes and fittings. The table below can be used as guidance to maximum velocities:

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Note#88

For submarine pipeline systems default corrosion allowance = 10 mm

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Note#87

For carbon steel piping, default corrosion allowance = 3 mm

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Note#86

A gas system is defined wet when the relative humidity exceeds 50 %.

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Note#85

Bolt torque tables should be obtained from the manufacture of gaskets

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Note#84

Rating is maximum allowable operating pressure

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Note#83

Corrosion resistance of stainless steel due to minimum 30% chromium in its content

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Note#82

Anchor flange fitting is used to prevent axial movements of pipeline

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Note#81

Welding repair percentage in RT reports equal or less than 3%

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Note#80

A maximum variability factor of 25% has been established by MSS to limit the load differential which may be prescribed in a variable spring support

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Note#79

Travel stops are installed in all constant spring support before shipping. These must be present during any hydro testing, but must be removed during installation before normal operations

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Note#78

Hydrazine is used within both nuclear and conventional electrical power plant steam cycles to control concentrations of dissolved oxygen in an effort to reduce corrosion.

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Note#77

Holiday Detector provides accurate detection of pinholes, flaws, inclusions, thin spots and bubbles in a coating.

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Note#76

The standard manufacturing thicknesses for spiral wound gaskets are 3.2, 4.5 & 6.5 (measured across metallic strip not including the filler which protrudes 0.2 : 0.3 mm beyond the metal

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