1.5 Ring Gasket Handling and Inspection before Assembly API requires that manufacturers box or wrap ring gaskets, but this provides no real assurance that they will arrive at the point of use undamaged. All ring gaskets finally seal by coining and intimate contact mandating that the seal contact area not have damage that will prevent continuous intimate contact after make-up and coining. Any bruise, gouge, (dent, ding, etc.) or groove across the seal contact area may prevent uniform coining and continuous intimate contact, resulting in leakage in the area of damage. Any rough handling or impact contact against hard surfaces or objects may cause damage to a ring gasket that renders it unusable. Keep soft iron and carbon steel ring gaskets dry to prevent rust and pitting. Note: The plating on these ring gaskets will provide some rust protection for a short time but any extended storage in a damp atmosphere or wetness may destroy the usefulness of these gaskets. Stainless steel ring gaskets forgive wet conditions.
Keep all ring gaskets in a secure area where other objects do not contact or bang against them. Transport and handle them using care not to crush, bruise, or scar them in any way. Before installing any ring gasket (and preferably before transporting to the installation site) inspect it carefully. Make certain the ring gasket stamped marking agrees exactly with that called for as fitting the intended connection. Be sure no damage exists on, or across, the seal contact surfaces; See table 2 below. Note: Ring gaskets marked SRX or SBX have identical measurements to RX and BX ring gaskets with the same number designation, and they will fit the same corresponding connectors. The “S” indicates these gaskets have vent holes to allow reliable connector make-up underwater (subsea). API Spec 17D requires that manufacturers use only corrosion resistant alloy as the material for these gaskets.
RING GASKET MARKING ALL MARKING COLD STAMPED ON O.D. DATE OF MANUFACTURE1 MANUFACTURERS NAME OR LOGO RING GASKET TYPE AND NUMBER2 MATERIAL: Soft iron Low-carbon steel 304 Stainless steel 316 Stainless steel
MARK: D-4 S-4 S-304-4 S-316-4
Other materials on request. 1 2
Manufacturer may use a code number to indicate date of manufacture. No distinctive marking required on R ring gaskets to differentiate. Oval or Octagonal.
Specifications and images are subject to change without notice. Karmsund Maritime Group AS is not responsible for typgraphical errors. 2019 - 1 // KaMOS® PRODUCTS - Karmsund Maritime Offshore Supply AS. All rights reserved.
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