Storage will be in a clean paved area or alternatively on timber baulks, away from construction working areas.
Equipment will be stored with all nozzles or support steel clear of the ground.
Equipment transportation supports or saddles will be checked for soundness and repaired as necessary.
This equipment is designated "open area storage" category, but must be provided with complete tarpaulin covering with free ventilation.
Ensure all nameplates are intact and secure.
Stainless steel (alloys containing more than 10% chromium) equipment, components and materials shall be externally protected as follows:
a) Under cover.
b) Not in contact with the soil or with porous supports such as raw wood. Sound protective coatings, subject to periodical inspection, are acceptable alternatives to covered storage.
In addition, austenitic stainless steel shall not be exposed to salt water, salt spray or salty atmosphere.
Columns/pressure vessels can be internally preserved either by maintaining them under nitrogen pressure or by making use of vapor phase corrosion inhibitors.
Site personnel shall be familiarized with the risk of nitrogen containing equipment.
Austenitic stainless steel items can be internally protected in accordance with the following preservation method:
1) Shop installed gaskets and blind flanges shall remain unremoved until installation of piping.
2) Maintenance of a nitrogen blanket on austenitic stainless steel is imperative.
3) The nitrogen gas pressure in the equipment shall be checked regularly.
4) If the pressure is below 0.5 bar(g), a refill with dry nitrogen is required. The oxygen content shall be less than 2 % by volume measured at the flushing outlet which shall be a maximum distance from the flushing inlet. The refill shall not start before nitrogen pressure is at 0.1 bar(g). When a pressure of less than 0.5 bar(g) is recorded, close monitoring is required (at least one a week).
5) When depressurizing is required during erection of equipment, it is imperative that the nitrogen blanket immediately be restored when this action is completed. Equipment shall be absolutely dry before refill can start. Temporary covers to avoid ingress of water are mandatory.
6) If the equipment is to reinspected, safety precautions are to be taken. Refer to Site Safety Procedures.
c) All columns/pressure vessels not referred to in 9.4.2.4 above can be protected in accordance with the following preservation method.
d) Vapor Phase Corrosion Inhibitors
Shell VPI 280 spray or bags can advantageously be used for the internal protection of engines, bearings, turbines, heat exchangers, pipes, drums, small tanks and identical equipment, preferably in non-hydrocarbon services. Equipment in hydrocarbon service shall be sprayed with Shell Ensis oil 30 with addition of 2% VSI 8235. For both vapor phase inhibitors refer to Shell recommendations. The equipment shall be closed thoroughly to allow vapor accumulation. Inspection at regular intervals is required at least every three months.
e) For all pressure vessels not protected in accordance with 9.4.2.4, temporary covers of nozzles or openings shall be removed, machined flange faces shall be cleaned and reprotected with suitable rust preventative, covers shall be repaired where necessary, then replaced and secured. Non-suitable covers will be replaced by wooden covers or equal.
f) All exposed bolts and flanges shall be coated with a heavy grease.
Verify openings for non-installed instruments. These shall be plugged or blanked off.
g) For equipment installed in elevated positions attention shall be paid to lightning protection: the earthing connection shall be made early.
