Description and Operation of Chiksan Marine Loading Arm Components.
1. Inboard arm.
This is the arm which connects to the suction and discharge flanged pipes on the deck of the tanker.
2. Outboard Arm.
This is the arm which is located on the jetty side of the terminal being bolted onto the base riser.
3. Base Riser.
The base riser is mounted on the jetty and supports the weight of the loading arm. It also provides the connection to the loading arm piping from shoreside storage tanks and pumps.
4. Swivel Joints
The swivel joint is undoubtedly the heart of the whole system. Consisting of three types containing one, two, or three swivels, it adjusts of the orientation of the loading arm piping as the ship is being loaded or discharged.
Swivel joints also maintain internal oil sealing, combined with external water and dust exclusion. They operate efficiently and smoothly due to integrated self-lubricating PTFE seals and a double row of ball bearings.
The different types of Swivel joints are fitted to the various sections of the loading arm pipework which are put under stress due to the tankers listing movements during cargo operations.
5. Powered Emergency Release System
The Powered Emergency Release System (PERS) allows for almost instant release of the connecting loading arm pipework between the jetty and the tanker in an emergency situation.
A stainless steel spring loaded, self-closing ball valve is fitted each side of the PERS that ensures virtually no spillage due to a sudden emergency disconnection of the pipework.
On the operation of the PERS, an alarm is triggered that automatically shuts-down the shoreside oil supply pumps and disconnection of the hydraulic coupling enabling the inboard section of the arm to be maneuvered from the ships connections
6. Hydraulic Quick Connect/Disconnect Couplings.
These are used to connect the inboard arm piping flanges to the ships suction and discharge flanges. They are adjustable to fit several standard sized flanges, being easily fitted without the use of flange bolts, washers, and the use of spanners.
7. Control Cables.
These cables are wound around the control wheels on the inboard and outboard sections, and allow the accurate location of the suction and discharge flanged pipes on the inboard arm section of the loading arm.
8. Counter Balance Weights.
These are positioned in different locations depending on the model and application of the loading arm; being used to counter-balance the weight of the outboard arm, assisting in smooth adjustment of the inboard arm.
chiksan - marine loading arms.
chiksan - swivel joint.
chiksan - PTFE swivel joint