HSE Standars for Pipeline Construction Onshore WILI

Doc No. HSE-S011-400-00 Page 1 of 8

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C96 & C97 Document No. HSE-S011-400

HSE Standards for Pipeline Construction, onshore Libya

DOCUMENT PURPOSE

This procedure defines minimum standards to be applied in pipeline construction in order to limit the extent of obstacles on the ground surface, and the associated risk to personnel in vehicles travelling in or around the construction site, and to define suitable warnings and crossing points.

DOCUMENT REVISION HISTORY

Rev. No. Date Reason for Revision By Review Sign

A1 First draft Issued for comment HSEC

A2 09.03.06 Formatted and issued to EP for comment HSEM

00 19.04.06 First Issue HSEM

This procedure must be reviewed every year Date of next review: April 2007

C96 & C97 HSE Standards for Pipeline Construction,

onshore Libya


1 Preparation

It is essential that the following HSE standards are communicated to potential

contractors at the earliest stage of the tendering process. The work flow for pipeline

construction and the required safety equipment all have a cost impact which must be

accurately reflected in any bid.

The Wintershall-Libya HSE Department must be represented in any negotiation with

the contractor over the scope of the construction project, either before award of

contract or after, if such negotiations could possibly impact the implementation of these

HSE standards or alter the HSE risk.

2 HSE Concerns

Trenching, the lay-out of equipment and materials, including the stringing of the

pipeline, represent a significant risk to persons driving across the route of the pipeline.

Construction and material planning should always being organized so that the size of

the construction site is minimized. The site should be adequately marked with

warning signs for both day and night and conditions of poor visibility.

Crossing points (road, sand track, pipelines) needs special set ups. The frequency and

setup of crossing points should be risk assessed for each pipeline construction. This

may involve consultation and negotiation with the community and other companies.

3 Procedure

The following minimum standards shall be applied.

Beginning / End of Site

If the construction comes close to a road, a minimum distance has to be fixed on

location. At the end position, additional floodlights need to be installed and drums have

to be used to form a funnel, (see Figure 1.).


onshore Libya


Figure 1. Site end position close to existing sand road (Drum-way)

Sand road with Drum- way markers

Minimum Distance needs to be fixed on location


onshore Libya


Road / Drumway and Track Crossings

Any route crossings need to be constructed in one day and need to be ready before

darkness. Routes include established roads (black-top, caliche, oil-sand), marked

drumways, and tracks without special markers but recognised as frequented routes.

Route Deviations

Deviations from the normal vehicle route have to be marked with drums, with additional

floodlights at the closing points from each direction. Behind the floodlight, a higher

bund wall has to be installed (min. 1 m). Figure 2. shows the set-up for a right-angle

crossing. The same precautions must be used for other geometries of crossings, but

with an adjusted layout.

Figure 2. Marking of deviations from existing vehicle routes.

Additional bund wall

Additional bund wall


onshore Libya


Site Length and Marking

Depending on the expected third party vehicle movements in the area of construction,

there are two general possibilities. The more stringent control (option A, or standards

exceeding the requirements of option A) should be in place where indicated by the

project specific risk assessment.

Option A) Maximum length of whole construction site not to exceed 4 km

A.1) Maximum length between first wooden blocks and refilling is 4 km,

A.2) At a minimum distance of 10 m each side of the pipe / trench, a 0.6 m high sand

bund wall shall be constructed. A second (outer) sand bund wall of 0.4 m high to be

constructed a further 15 m out from the first bund walls. In addition, red/white drums

with a warning X marked with reflecting tape fixed to the top of the drum (see Figure

3.) should be located close to the outer bund wall and at 100 m intervals (on both sides

of the construction site),

A.3) During darkness the complete length of the construction has to be lighted with

floodlights.

A.4) Each individual pipe joint is to be marked with longitudinally fixed reflecting tape of

approximately 8 mm width. This tape should be mounted at 120 degree intervals on the

circumference of the pipe so that it is visible from all sides (see Figure 5.).

Option B) No maximum length of whole construction site BUT following a risk assessment the site length should be as short as reasonably practicable.

B.1) Forward laying of non connected pipes and wooden blocks should not exceed the

foreseen welding progress of 2 days,

B.2) Crossing points have to be installed every 3 km and need to be equipped with

floodlights and construction lighting (see Figure 4.). Crossing points are to be kept

open while surface hazards remain (strung pipe, open trench, etc.),

B.3) At a minimum distance of 10 m each side of the pipe / trench, a 0.6 m high sand

bund wall shall be constructed. A second (outer) sand bund wall of 0.4 m high to be

constructed a further 15 m out from the first bund walls. In addition, red/white drums

with a warning X marked with reflecting tape fixed to the top of the drum (see Figure

3.) should be located close to the outer bund wall and at 100 m intervals (on both sides


onshore Libya


of the construction site). A warning light (red or yellow, flashing or constant) shall be

secured to every fourth drum (400 m intervals).

B.4) Beginning and endpoint of the site to be secured with drums standing at 10 m

intervals. Area has to be lighted with floodlights during darkness.

B.5) Each individual pipe joint is to be marked with longitudinally fixed reflecting tape of

approximately 8 mm width. This tape should be mounted at 120 degree intervals on the

circumference of the pipe so that it is visible from all sides (see Figure 5.).

Figure 3. Drum and bund wall warnings.

100

Pic 1

10m

0.6m

min. 10m

Reflecting tape

15m

0.4m

15m


onshore Libya


Figure 4. Design and spacing of crossing points.

Figure 5. Reflecting tape fixed to pipe.

8 mm

Front view of the pipe.


onshore Libya


4 Reference Documents

All construction companies should familiarise themselves with Wintershall-Libyas

general HSE requirements for contractors.

HSE Standars for Pipeline Construction Onshore WILI

Documents

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