Chiksan ââââ T&RC Loading Arms - FCE

Copyright 2001
Chiksan T&RC Loading Arms

Chiksan T&RC Loading Arms
General Considerations
Floating roof drains get rid of water on storage reservoir floating roofs, notably for
petroleum products.
FMC offers a floating roof drain model available in 3", 4" and 6" diameters.
It is a Chiksan 5448-type jumper assembly with two flanged end connections. It
is equipped with LCH (3", 4") or LFSA (6") swivel joints. All three L1, L2 and L3
elements are in standard steel; L1 and L2 lengths vary according to tank height,
L3 has a constant length. The upper style 80 is either horizontally or vertically
inclined, according to the connection on the roof drain box.
In order to ease transport – notably reducing volume and weight - FMC offers a
different "kit" version, which includes swivel sub-units (gray sections). The client
supplies L1 and L2 pipe lengths and fabricates the final drain.
The two assembled flanges (UB) ease roof drain installation, as they enable to
separate the drain into 3 elements:
style 50 + L1
style 40 + L2
style 40 + L3 + style 80
UB
UB
Copyright 2001

Chiksan T&RC Loading Arms
Assembly in reservoir
The following drawing shows drain configuration folded in tank side view:
Diagram below shows view from above to scale:
Sizes shown in the following tables show drain
dimensions based on internal tank configuration.
∅ E F G
3" 350 200 150
4" 350 200 150
6" 450 250 200
H
L1
L2
L3
mm 8600 9400 10300 11200 12000 12900 13800 14600 15500 16400 17200 18100 19000 19900
ft-in 28'-0" 31'-0" 34'-0" 37'-0" 39'-6" 42'-0" 45'-0" 48'-0" 51'-0" 54'-0" 56'-6" 59'-0" 62'-6" 65'-0"
mm 5000 5500 6000 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500
ft-in 16'-6" 18'-0" 20'-0" 21'-6" 23'-0" 24'-6" 26'-0" 28'-0" 29'-6" 31'-0" 33'-0" 34'-6" 36'-0" 38'-0"
mm 4500 5000 5500 6000 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000
ft-in 15'-0" 16'-6" 18'-0" 20'-0" 21'-6" 23'-0" 24'-6" 26'-0" 28'-0" 29'-6" 31'-0" 33'-0" 34'-6" 36'-0"
mm 500 500 500 500 500 500 500 500 500 500 500 500 500 500
ft-in 1'-8" 1'-8" 1'-8" 1'-8" 1'-8" 1'-8" 1'-8" 1'-8" 1'-8" 1'-8" 1'-8" 1'-8" 1'-8" 1'-8"
H: Maximum height under roof according to level 0
Copyright 2001

Chiksan T&RC Loading Arms
Kinematics
Diagram below shows drain position in relation to floating roof level:
Lowest position of roof
Intermediate position of roof
Highest position of roof
Copyright 2001

Chiksan T&RC Loading Arms
Connection to draining systems
As shown previously, the upper style 80 is vertically or horizontally inclined,
according to existing installation connection flange configuration.
The following diagrams provide a detailed view of both connection designs:
Horizontal design
adjustable chain to limit
opening to 120 °
Vertical design
chain lug
threaded chain
connection
Copyright 2001

Chiksan T&RC Loading Arms
Chiksan LCH Swivel Joint for immerged application
Floating roof drains are equipped with the Chiksan LCH Swivel Joint, which is
specially designed to meet submerged application requirements.
Data Sheet 3.10, Section 1, describes the Chiksan Swivel Joint for submerged
applications.
We recall, here, its characteristics that provide it with excellent sealability in the
outside – inside direction:
presence of a secondary seal in contact with liquid,
ball plugs sealed with suitable cement.
Floating roof drain swivel joints are usually equipped with aromatic-resistant,
viton, main seals. For special applications, such as MTBE, ETBE, lead-free
petrol, they are equipped with high-quality PTFE main packing and a secondary
seal.
The two following sealability tests are plant-performed:
pneumatic test with 0.2 MPa air (swivels submerged in water),
full connection hydraulic test at 0.35 MPa.
Copyright 2001

Chiksan T&RC Loading Arms
Information required for processing quotation
Y
CONFIG.
horizontal designH
X
Y
X
CONFIG.
V
L3
drain diameter : d
h
L2
H
L
L1
slope % : P
Work
Ht
a
slope % : p
b
Hs
g
D
Indicative data
Configuration of the upper fixed pipe ....................................vertical ❑ horizontal ❑
Distance between centerline (or face) of flange and centerline of tank ......... X ................
Distance between face (or centerline) of flange and lower face of roof ......... Y ................
Distance maxi between lower face of roof and ground level .......................... H ................
Distance mini between lower face of roof and ground level (work position) Ht ................
Distance between centerline of outlet flange and level 0 ............................... a ................
Distance between face of outlet flange and outside wall of tank ................... g ................
Outside diameter of tank ................................................................................ D ................
Diameter of swivel assembly (in ) ................................................................ d ................
Slope of bottom of reservoir ( % ) .................................................................. P ................
Copyright 2001