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DNV-OS-C401 Fabrication and Testing of Offshore Structures
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Ch.2 Sec.6
C 100 Contact surfaces in slip resistant
connections
Ch.2 Sec.6 C
101 If required, contact surfaces in preloaded joints shall be
prepared to produce the class of friction surface as required.
Ch.2 Sec.6 C
102 Details of surface treatments, which may be assumed to provide
the stated classes of friction surface, are given in DNV-OS-C101
Sec.5.
Ch.2 Sec.6 C
103 The class of friction surface produced by other treatment
may be determined according to other international recognised standards.
Ch.2 Sec.6 C
104 Contact surfaces shall be cleaned and roughened by blasting
with an appropriate material to produce a surface confirming the
required quality. In case of coated surfaces, this treatment shall
be followed immediately by the application of the appropriate coating.
Ch.2 Sec.6 C
105 At the time of assembly, the contact surfaces shall be free
from all contaminants, such as oil, dirt or paint, except for a
slip resistant coating. Burr that would prevent solid seating of
the connecting parts shall be removed.
Ch.2 Sec.6 C
106 Oil shall be removed from the surface by using chemical cleaners,
not by flame-cleaning.
Ch.2 Sec.6 C
107 If un-coated surfaces cannot be assembled directly after preparation
of the contact surfaces, they should be freed from all thin films
of rust and other loose material by brushing with a steel brush.
Care should be taken not to damage or smooth the roughened surface.
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