Number of stacked pipe in stockyard

[suracay]

All

I am new in this pipeline engineering , I had a project that due to its contract arrangement, the coated pipeline will have to be in storage for estimated 3 month or more.

My problem is to know the measure maximum height of stacked coated pipe in stockyard so that the weight of pipe is not damaging the coating...

Do you have any source, spreadsheet, or reference?

Thanks...

Note that API 5 LW is only managing stacking during transportation, not in a yard where space is huge...

[suracay]

Up... up... up...

Need response pleaseeee... thanks....

[Andycapp23]

Did you ever get an answer?

Up... up... up...

Need response pleaseeee... thanks....

[Mr Welder]

1 SPECIFIC

1.1 System Stacking Tubes

1.1.1 The first layer of tubes of the stack must be supported by wooden beams with
minimum length of 3 m cross-section of at least 15 cm x 15 cm.

1.1.2 The support should be installed so that the tubes have a stored
trim at least 1% to avoid the accumulation of water in their interiors.

1.1.3 Stacking of pipes shall be in accordance with FIGURES 1 and 2.

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[Mr Welder]

1.1.4 In the case of storage be made in less than 12 months under
normal or less than 6 months in areas aggressive, the tubes can be stored in the form
pyramidal or prismatic, adopting the calculation of the maximum number of layers described in
1.2.1.


1.1.5 For the storage of coated pipes with FBE, coal tar and asphalt enamel should
make use of bags with sand or rice hulls to space the tubes (see Figure 1). The
life of the bags must be compatible with the storage period. For the protection of
FBE coated tubes should be kept the rings of synthetic rope also
spaced.


1.1.6 In the case of storage for a period exceeding 12 months under normal conditions, or
6 months in areas aggressive to be adopted the system of prismatic stacking
wedge spacer (as FIGURE 3) between the tubes of the same layer, to
prevent accumulation of waste and water.

[link Point to another website Only the registered members can access]


Figures in larger size

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[AnandV]

Very Good, We need to store 3LPE coated pipes of 900mm & 1100mm dia in near future. If you could tell the source of info we can make use of it.

[Mr Welder]

Very Good, We need to store 3LPE coated pipes of 900mm & 1100mm dia in near future. If you could tell the source of info we can make use of it.

Coated Tubes 3LPE

Description

Can be buried or submerged

Coating consisting of three layers, the first FBE primer in spray coating. second layer
adhesive copolymer and polyethylene in the third density used for extrusion side, ensuring adherence required. The use of FBE as "primer" and the barrier
formed by the blanket of polyethylene to form a system excellent mechanical properties and corrosion of the pipe carbon steel. The 3LPE is formed, usually by 150-250 mm in
FBE, followed by 120-250 mm in a copolymer that promotes adhesion between the primer and polyethylene (different polarity) and finally the blanket of polyethylene with a thickness that varies depending on the dimension of the tube and apply the product.

[link Point to another website Only the registered members can access]



Can reach operating temperature to 80 ° C ,excellent corrosion resistance, excellent mechanical protection.
Good resistance to chemicals cathodic resistance (28 days at 23 °C , less than 10 mm), excellent water resistance. Excellent impact resistance (5J/mm thick without holiday)


Repairs and field joints

They are used in repair "-----es", "melt stick" or "mastic
filler "and for coating field joints are recommended
thermal blankets or quilts contractile applied cold.

Handling

A bare and coated pipes
1.1 The handling of the tubes should be done to avoid damage, especially the bevels and the
coating.

1.2 For coated pipe, the handling should be done using straps with a minimum width of 15 cm,
made of rubber, plastics, leather or canvas, free of sharp, such as screws and rivets. One can
Moreover, use of forklift forks open properly protected with rubber or plastic, or other
devices that do not damage the finish or bezels.

1.3 All areas of the coated tube coming into contact with the handling accessories should be
inspected and repaired if necessary.

1.4 Epoxy Powder
The epoxy powder should be kept in its unopened package until the time of use.


2 Storage

2.1 Coating Materials
2.1.1 The epoxy powder should be stored in its container, away at least 10 cm from the ground at a temperature not exceeding 27 ° C and relative humidity less than or equal to 70%. The conditions should be controlled and recorded continuously.
2.1.2 All other materials required for the coating should be stored in a covered and
ventilated. Should be kept in their original containers, away from any heat sources and away from the
least 10 cm of soil in order to avoid damage.
2.1.3 All materials shall be stored so that they can be used primarily those
with the oldest date of manufacture.

3 naked or coated tubes

3.1 The storage should be done to avoid any damage or deterioration that may
compromising the performance of the coating.

3.2 During storage, the tubes of which the diameter / thickness is greater than 120 must have
spreaders installed at both ends, so to avoid deformations.

3.3 When requested by the client, the coater must present the procedure for storing
tubes.

3.4 In the case of coated tubes were stored for more than 12 months under the action of weathering,
must be served the following:

1: select the tube that is exposed to the sun

2(*): conduct the impact test on the side of the tube exposed to the sun
(*):The tests shall be performed at three points of the tube, spaced from one another in at least
30 mm.
After the impact test, the coating must be subjected to the test of discontinuity.
The inspection must be made of discontinuity across the surface of all coated tubes.
3: extract samples of polyethylene on the side exposed to the sun and the diametrically opposite side
4: samples should have the greatest possible thickness of the polyethylene layer, taking care not to reach the adhesive layer
5 (*): determine the melt index
(*): Properties: Melt Index = 190ºC /2.16 kg
UNITS: g / cm ³
LIMIT VALUES: PEMD = 0.926 to 0.939
PEAD = equal to or greater than 0.940

(6): The difference between the rates of flow of the exposed side and on the side exposed to the sun can not be greater than 25%;


(7): If it fails, the tube should be rejected and a verification procedure should be initiated with the objective to define the irregularity;

(8): With no rejection, all areas damaged by the tests should be repaired.

NOTE: The coated tubes should not be stored in contact with copper and its alloys.
The bevels should have no contact with copper and its alloys.