This article is about SAES-L-450 which is about Construction of On-Land and Near-Shore Pipelines and download SAES-L-450 PDF for piping and mechanical engineers, supervisors and project managers. This is saudi aramco standard based on international codes and standards and useful for piping and mechanical engineering knowledge to get job as engineers, QC Supervisors and QC managers, Engineering managers and technicians.
SAES-L-450 PDF
SAES-L-450SAES-L-450 On-Land and Near-Shore Pipelines
This standard serves as a supplement to the ASME B31.4 and ASME B31.8 transportation piping codes. It provides additional construction requirements specifically for onshore cross-country pipelines. The standard covers both metallic and non-metallic line pipes used in these pipelines.
It’s important to note that this standard does not apply to offshore and sub-sea pipelines. Different standards and regulations typically govern the design and construction of pipelines in offshore and sub-sea environments due to unique considerations and challenges specific to those settings.
Pipeline Route, Profile and Right of Way
In accordance with the mentioned standard, the following requirements apply to the pipeline route, profile, and right of way:
Pipeline Route and Profile:
The Construction Contractor is responsible for surveying and staking the pipeline route as specified in the Issued for Construction (IFC) drawings. Changes to the original routing may be allowed with prior approval as per Section 6.
The Construction Contractor must verify the original vertical profile of the pipeline, including the amount of cover, location and degree of elastic and preformed bends. This verification should be done in accordance with the standard and construction drawings. The change in slope of the pipeline at a normal spacing of 30 meters and at intermediate stations, as required, should be calculated.
Fills and cuts should be made to minimize the number and magnitude of overbends and sagbends in the pipeline. However, fills should be avoided in areas where they would affect the natural drainage of the surrounding area.
Precautions should be taken to prevent wash-out of the pipeline cover by rainstorms if the pipeline construction alters the natural drainage pattern.
Pipeline Right of Way (ROW):
The construction right-of-way should be graded to a flat or smooth rolling surface and maintained in a condition accessible to standard four-wheel drive vehicles on at least one side of the line throughout the construction period. Irregularities should not obstruct access for construction equipment.
In sabkha areas, fills should be provided as needed to support construction equipment. The width of these fills and cuts should not be less than the area requiring stabilization as outlined in Section 14. The slopes adjacent to the fills should not be steeper than four to one. The construction and final right-of-way width should not be less than 6 meters.
In sand dune areas, the leveled and stabilized right-of-way width should be 3 meters on each side of the pipeline, with an additional 1 meter for every 1 meter of dune height or fill height in both the cut and fill areas.
The final finished right-of-way should have a minimum width of 5 meters (6 meters in sabkha areas and 3 meters in sand dune areas) measured from the bottom edge of the pipeline berm. It should be completed in a manner that allows routine operation and maintenance access using standard four-wheel drive vehicles.
General Fabrication Requirements
According to the mentioned standard, the following general fabrication requirements apply:
Vents and drains should not be installed unless they are included in the approved design drawings. The design drawings should comply with SAES-L-110.
Installation of temporary vents and drains is not permitted without prior approval. If temporary vents are field installed, nipples and valves should be removed, and bosses should be plugged, seal welded, and penetrant tested after the hydrostatic test.
Drains should not be installed at the bottom of the pipe for buried pipelines.
The assembly of bolted flange joints should follow the guidelines provided in SAEP-351.
Connections to existing piping systems using hot tap and stoppling techniques should be carried out in accordance with SAEP-311.
Pipeline kilometer marker plates should conform to the specifications outlined in Standard Drawings AB-036907 and AD-036973.
FAQs Related to SAES-L-450 PDF
Q: What is the scope of SAES-L-450?
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SAES-L-450 is a standard that supplements the ASME B31.4 and ASME B31.8 transportation piping codes. It defines additional construction requirements for onshore cross-country pipelines. The standard applies to both metallic and non-metallic line pipe.
Q: Are offshore pipelines covered by SAES-L-450?
No, SAES-L-450 is not applicable to offshore and sub-sea pipelines. It specifically focuses on onshore pipelines.
Q: Which piping codes are supplemented by SAES-L-450?
A: SAES-L-450 supplements the ASME B31.4 and ASME B31.8 transportation piping codes. These codes provide guidelines for the design, construction, and operation of pipelines.
Q: Can changes be made to the original pipeline route?
A: Changes to the original routing may be acceptable with prior approval as specified in Section 6 of SAES-L-450. The Construction Contractor is responsible for surveying and staking the pipeline route.
Q: How is the pipeline profile verified during construction?
A: The Construction Contractor is required to field verify the original vertical profile of the pipeline, including the amount of cover, location, and degree of elastic and preformed bends. The change in slope at regular spacing and intermediate stations should be calculated.
Q: Are there any guidelines for managing overbends and sagbends in the pipeline?
A: Fills and cuts should be made to reduce the number and magnitude of overbends and sagbends in the pipeline. However, fills should be avoided in areas where the natural drainage of the surrounding area would be affected.
Q: What are the requirements for the pipeline right-of-way (ROW)?
A: The construction right-of-way should be graded to a flat or smooth rolling surface and maintained accessible with standard four-wheel drive vehicles on at least one side of the line during the construction period. The final finished right-of-way should be a minimum width, depending on the terrain, to allow routine operation and maintenance access.