3LPE coating pipe and fititng loading procedure

3LPE coating

3LPE Coating stands for the three-layer polyethylene coating of the metal. 3LPE coating is most of the users in the pipeline coatings. 3LPE Coating is a multi-layer coating that is composed of three functional components, where Epoxy use as a primer coating of the base metal, and the middle layer is a Polymer adhesive that uses as a secondary primer and polyethylene, is the last layer of the coating. 3LPE coating has a very high mechanical and chemical property that withstands the share tear and wear. Where Epoxy has an excellent chemical and mechanical Corrosion resistance and Polymer is an adhesive material that has a good bonding property with epoxy and polyethylene, and the last layer of the coating is that Polyethylene which has very high Chemical and Mechanical properties which are preventing a chemical reaction with Environment and wear and tear respectively.

HANDLING, TRANSPORTATION AND STORAGE

A-1 The Applicator shall be fully responsible for the pipe and for the pipe identification marking
from the time of “taking over” of bare pipe from Company until such time that the coated line
pipes are ‘handed over’ and/or installed in the permanent installation as the case may be
according to the provisions of the CONTRACT.

A-2 At the time of “taking over” of bare pipes, Applicator shall inspect and record all the relevant
details referred above including pipe defects in the presence of Company. All pipes shall be
checked for bevel damages, weld seam height, dents, gouges, corrosion and other damages.
Company Representative shall decide whether pipe defects / damages are suitable for repair.
Damage to the pipes that occur after the Applicator has taken delivery such as dents, flats, or
damage to the weld ends shall be cut off or removed and pipes rebevelled and repaired again
as necessary. The cost of this work, as well as that of the pipe lost in cutting and repair shall
be to the Applicator’s account. All such works shall be carried out after written approval of the
Company. Any reduction in length shall be indicated in the Applicator’s pipe tracking system.
A-3 The Applicator shall unload, load, stockpile and transport the bare pipes within the coating
plant(s) using suitable means and in a manner to avoid damage to pipes. The Applicator shall
stockpile the bare pipes at the storage area of the coating plant. The Applicator shall prepare
and furnish to Company a procedure/ calculation generally in compliance with API RP 5L1 for
stacking of pipes of individual sizes, which shall be approved by Company prior to
commencement.
A-4 The bevel protectors shall be removed and stored for reuse after completion of coating
application. The ends of the pipes during handling and stacking shall always be protected with
bevel protectors.
A-5 The Applicator shall load, unload, transport and stockpile the coated pipes within the coating
plant using approved suitable means and in a manner to avoid damage to the pipe and coating.
The Company shall approve such procedure prior to commencement of work.
A-6 Coated pipes may be handled by means of slings and belts of proper width (minimum 60
mm)made of non-abrasive/ non-metallic materials. In this case, pipes to be stacked shall be
separated row by row to avoid damages by rubbing the coated surface in the process of taking
off the slings. Use of round sectional slings is prohibited. Fork lifts may be used provided that
the arms of the forklift are covered with suitable pads, preferably rubber
A-7 Bare/ coated pipes at all times shall be stacked completely clear from the ground, at leas
300mm, so that the bottom row of pipes remains free from any surface water. The pipes shall
be stacked at a slope so that driving rain does not collect inside the pipe. Bare/ coated pipes
may be stacked by placing them on ridges of sand free from stones and covered with a plastic
film or on wooden supports provided with suitable cover. This cover can be of dry, germ free
straw covered with plastic film, otherwise foam rubber may be used. The supports shall be
spaced in such a manner as to avoid permanent bending of the pipes.
A-8 Stacks shall consist of limited number of layers such that the pressure exercised by the
pipe’s own weight does not cause damages to the coating. Applicator shall submit calculations for
Company approval in this regard. Each pipe section shall be separated by means of spacers
suitably spaced for this purpose. Stacks shall be suitably secured against falling down and shall
consist of pipe sections having the same diameter and wall thickness. The weld seam of pipes
shall be positioned always in a manner so as not to touch the adjacent pipes.
A-9 The lorries used for transportation shall be equipped with adequate pipe supports having as
many round hollow beds as there are pipes to be placed on the bottom of the lorry bed. Total
width of the supports shall be at least 5% of the pipe length and min. 2 no. support shall be
provided. These supports shall be lined with a rubber protection and shall be spaced in a manner
as to support equal load from the pipes. The rubber protection must be free from all nails and
staples where pipes are in contact. The second layer and all following layers shall be separated
from the other with adequate number of separating layers of protective material such as straw
in plastic covers or mineral wool strips or equivalent, to avoid direct touch between the coated
pipes.
A-10 All stanchions of Lorries used for transportation shall be covered by non-abrasive material like
rubber belts or equivalent. Care shall be exercised to properly cover the top of the stanchions
and other positions such as reinforcement of the truck body, rivets, etc. to prevent damage to
the coated surface. Slings or non-metallic straps shall be used for securing loads during
transportation. They shall be suitably padded at the contact points with the pipe
A-11 Materials other than pipes and which are susceptible of deteriorating or suffering from damages
especially due to humidity, exposure to high thermal excursions or other adverse weather
conditions, shall be suitably stored and protected. Deteriorated materials shall not be used and
shall be replaced at Applicator’s expenses. These materials shall always be handled during
loading, unloading and storage in a manner so as to prevent any damage, alteration and
dispersion. When supplied in containers and envelopes, they shall not be dropped or thrown,
or removed by means of hooks, both during the handling operations till their complete use.
During unloading, transport and utilization, any contact with water, earth, crushed stone and
any other foreign material shall be carefully avoided.
A-12 Applicator shall strictly follow Manufacturer’s instructions regarding storage temperature and
methods for volatile materials that are susceptible to change in properties and characteristics
due to unsuitable storage. If necessary the Applicator shall provide for a proper conditioning.
A-13 In case of any marine transportation of bare/coated line pipes involved, the same shall be
carried out in compliance with API RP 5LW. Applicator shall furnish all details pertaining to
marine transportation including drawings of cargo barges, storing/stacking, sea fastening of
pipes on the barges/marine vessels to the company for approval prior to undertaking such
transportation works. In addition, Applicator shall also carry out requisite analyses considering
the proposed transportation scheme and establish the same is safe and stable. On-deck overseas
shipment shall not be allowed.
14 . 0 MEASUREMENT AND LOGG