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R. Sharma and V. Tanna
(a) Chequred plate
(b) Central pipe
(c) Treads of ladder
Fig. 12 Dye penetration test of elements of structure
by government approved laboratory.
8 Technical Challenges and Experience
It was difficult task to get the approval from CCOE of installation of spiral ladder
and joint platform bridge type structure for renewal of license to operate the high
pressure storage vessels. At 13 m height, installation, lifting of heavy elements of
structure by crane, welding of structure, painting and assembly were the challenges
encountered. As per the CCOE norms, the restriction of welding to vessels elements
and installation of supports in vessels premises were the main technical challenge to
overcome the bending and cantilever aspects of structure.
9 Result and Discussion
This CCOE approved spiral ladder and joint platform structure has been designed;
installed at IPR site which facilitated the movement of working personnel to any
one of the four vessels by a single spiral ladder. The result shows that the structure
is capable of total load of 300 kg on the vessels. Each elements of structure design
was acceptable under failure condition. No cantilever and budging effect, bending on
chequered plate were observed. The upgraded fabricated structure has been validated
practically during our routine maintenance activities and is also very useful for the
periodic hydrostatic testing of vessels where the movement on the vessels is frequent
to carry out the tasks. The objective of this work has been fulfilled by facilitating a
safe working environment to manpower.
Acknowledgements The author is very thankful to M/s Round Tech Co., Ahmedabad for completion of fabrication, installation, and assembly of the complete structure at IPR site in dedicated
R. Sharma and V. Tanna
(a) Chequred plate
(b) Central pipe
(c) Treads of ladder
Fig. 12 Dye penetration test of elements of structure
by government approved laboratory.
8 Technical Challenges and Experience
It was difficult task to get the approval from CCOE of installation of spiral ladder
and joint platform bridge type structure for renewal of license to operate the high
pressure storage vessels. At 13 m height, installation, lifting of heavy elements of
structure by crane, welding of structure, painting and assembly were the challenges
encountered. As per the CCOE norms, the restriction of welding to vessels elements
and installation of supports in vessels premises were the main technical challenge to
overcome the bending and cantilever aspects of structure.
9 Result and Discussion
This CCOE approved spiral ladder and joint platform structure has been designed;
installed at IPR site which facilitated the movement of working personnel to any
one of the four vessels by a single spiral ladder. The result shows that the structure
is capable of total load of 300 kg on the vessels. Each elements of structure design
was acceptable under failure condition. No cantilever and budging effect, bending on
chequered plate were observed. The upgraded fabricated structure has been validated
practically during our routine maintenance activities and is also very useful for the
periodic hydrostatic testing of vessels where the movement on the vessels is frequent
to carry out the tasks. The objective of this work has been fulfilled by facilitating a
safe working environment to manpower.
Acknowledgements The author is very thankful to M/s Round Tech Co., Ahmedabad for completion of fabrication, installation, and assembly of the complete structure at IPR site in dedicated