Flameproof joints
5.1 General requirements
All flameproof joints, whether permanently closed or designed to be opened from time to time,
shall comply, in the absence of pressure, with the appropriate requirements of Clause 5.
The design of joints shall be appropriate to the mechanical constraints applied to them.
The dimensions given in Tables 1, 2, 3 and 4 form part of the specifications of this standard
and constitute the minimum necessary conditions. Additional measures may be necessary in
order to pass the non-transmission test of 15.2.
The surface of joints may be protected against corrosion.
Coating with paint or powder-coat finish is not permitted. Other coating material may be used if
the material and application procedure have been shown not to adversely affect the flameproof
properties of the joint.
A corrosion inhibiting grease may be applied to joint surfaces before assembly. The grease, if
applied, shall be of a type that does not harden because of ageing, does not contain an
evaporating solvent, and does not cause corrosion of the joint surfaces. Verification of
suitability shall be in accordance with the grease manufacturer's specifications.
Joint surfaces may be electroplated. The metal plating, if applied, shall not be more than
0,008 mm thick.
Flameproof joints5.1 General requirementsAll flameproof joints, whether permanently closed or designed to be opened from time to time,shall comply, in the absence of pressure, with the appropriate requirements of Clause 5.The design of joints shall be appropriate to the mechanical constraints applied to them.The dimensions given in Tables 1, 2, 3 and 4 form part of the specifications of this standardand constitute the minimum necessary conditions. Additional measures may be necessary inorder to pass the non-transmission test of 15.2.The surface of joints may be protected against corrosion.Coating with paint or powder-coat finish is not permitted. Other coating material may be used ifthe material and application procedure have been shown not to adversely affect the flameproofproperties of the joint.A corrosion inhibiting grease may be applied to joint surfaces before assembly. The grease, ifapplied, shall be of a type that does not harden because of ageing, does not contain anevaporating solvent, and does not cause corrosion of the joint surfaces. Verification ofsuitability shall be in accordance with the grease manufacturer's specifications.Joint surfaces may be electroplated. The metal plating, if applied, shall not be more than0,008 mm thick.
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