115
—
Works carried out and chargeable to Loan Funds.
The laying of the submarine pipe was completed on February 17th having taken 57 working days from the date of laying the 1st pipe. The connections between the submarine and land pipes at both ends were completed on February 23rd and from that date to March 31st when the pipe line was officially opened by His Excellency the Officer Administering the Government, the setting of anchor blocks, driving of piles, excavation of major protective works and general testing of the pipe line were carried out. Further protective works however were found necessary and these were completed by the end of May.
The pipe line is composed of lap welded steel pipes 12.265″ internal dia. and 7/16″ thick in random lengths of 18′ to 22′ having tapered spigots and sockets 8″ in length for long sleeve welded joints. The inside and outside of the pipes are coated with bitumen, the outside being doubly wrapped with hessian cloth impregnated with bitumastic solution.
Lengths of approximately 100′ were fabricated at a specially constructed Assembly Yard and consisted generally of 3 long sleeve spigot and socket welded pipes with a special loose flange and spigot pipe at one end and a special loose flange and socket pipe at the other, thus forming a double loose flanged length of 100′ approximately. The flanges, which were of the patent Albion type, were loose and of cast steel, being male at one end and female at the other. A rubber ring was used between the lengths of pipe, the joint being secured by 10 No. 1″ dia. steel bolts.
Flanged steel ball and socket joints of two kinds having an angular travel in any direction of 18° and 25° from centre line were used to provide for any change of line and gradient of the pipe line, and these were spaced generally about 300′ apart.
Special Expansion Joints of the Vulcan sleeve type having a travel of 10″ were used about every 600′ to provide for expansion and contraction in the pipe line due to temperature and settlement.
Opposite every ball and socket joint and up to a depth of water of 35′, concrete piles in pairs 12″ sq. were driven to prevent lateral movement. Over 35′ deep, heavy concrete anchor blocks weighing 17 tons each in air and of special shape were used for a similar purpose.
The bed of the harbour on the line of the pipe consisted generally of hard sand, with occasional small boulders. At the Kowloon end of the pipe line for a length of approximately 800′ and at Hong Kong end for a length of approximately 400′, the harbour bed consisted of mud and this was dredged to a depth of about 4′ and was replaced by a rubble mound on which the pipe was laid.
115
—
Works carried out and chargeable to Loan Funds.
The laying of the submarine pipe was completed on February 17th having taken 57 working days from the date of laying the 1st pipe. The connections between the submarine and land pipes at both ends were completed on February 23rd and from that date to March 31st when the pipe line was officially opened by His Excellency the Officer Administering the Government, the setting of anchor blocks, driving of piles, excavation of major protective works and general testing of the. pipe line were carried out. Further protective works however were found necessary and these were completed by the end of May.
The pipe line is composed of lap welded steel pipes 12,265′′ internal dia. and 7/16" thick in random lengths of 18′ to 22′ having tapered spigots and sockets 8" in length for long sleeve welded joints. The inside and outside of the pipes are coated with bitumen the outside being doubly wrapped with hessian cloth impregnated with bitumastic solution.
Lengths of approximately 100' were fabricated at a specially constructed Assembly Yard and consisted generally of 3 long sleeve spigot and socket welded pipes with a special loose flange and spigot pipe at one end and a special loose flange and socket pipe at the other, thus forming a double loose flanged length of 100 approximately. The flanges which were of the patent Albion type were loose and of cast steel being male at one end and female at the other. A rubber ring was used between the iengths of pipe, the joint being secured by 10 No. 1" dia. steel bolts.
Flanged steel ball and socket joints of two kinds having an angular travel in any direction of 18° and 25° from centre line were used to provide for any change of line and gradient of the pipe line and these were spaced generally about 300' apart.
Special Expansion Joints of the Vulcan sleeve type having a travel of 10′′
10" were used about every 600' to provide for expansion and contraction in the pipe line due to temperature and settlement.
Opposite every ball and socket joint and up to a depth of water of 35' concrete piles in pairs 12′′ sq. were driven to prevent lateral movement.
movement. Over 35′ deep,
Over 35′ deep, heavy concrete anchor blocks weighing 17 tons each in air and of special shape were used for a similar purpose.
The bed of the harbour on the line of the pipe consisted generally of hard sand, with occassional small boulders. At the Kowloon end of the pipe line for a length of approximately 800° and at Hong Kong end for a length of approximately 400′ the harbour bed consisted of mud and this was dredged to a depth of about 4 and was replaced by a rubble mound on which the pipe was laid.
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