Hydrostatic Pipeline Tests
A selection of hydrostatic tests performed by HTS includes:
Central Ranges Pipeline.
This natural gas pipeline runs from Dubbo to Tamworth in NSW and comprises 240 km of DN200 and 50 km of DN150 pipe with an MAOP of 10,200 kPag. The line was tested in five sections in close coordination with the construction contractor and client. Equipment (pump) failure dogged the initial operation however these difficulties were overcome resulting in a successful test.
This natural gas line in the western Darling Downs in Queensland comprises 126km of DN350 pipe with an MAOP of 15,300 kPag. The line was tested in 3 sections in close coordination with the construc tion contractor. Sourcing and handling water with the large elevation differences proved challenging, but with ultimately successful results.
This oil line from Jackson in SW Queensland to Moomba in NE South Australia comprises 205km DN200 pipe with an MAOP of 15,300 kPag traversing remote outback country. The line was tested in 5 sections in close coordination with the construction contractor.
This oil line in SW Queensland comprises 130km of DN250 pipe with an MAOP of 15,300 kPag traversing remote outback country. The line was tested in two sections in close coordination with the construction contractor.
Jet – Diesel Fuel Pipelines.
These pipelines range in size from DN100 to DN350 with an MAOP of 2450 kPag and have been mainly tested on Jet A1 or diesel. Locations of these pipelines include: Australia, China, Fiji, Noumea, Raratonga, Singapore and Vanuatu.
LionOre Lateral Gas Pipeline.
This natural gas pipeline in remote Western Australia comprises 23km of DN100 pipe with an MAOP of 10,200 kPag.
Moran Injection Pipelines.
These pipelines comprise approximately 40km of a DN200 pipeline system running from a compressor at the Moran plant in Central Highland of PNG to several wells where the gas is re-injected. The MAOP of the pipelines is #2500, an extremely high pressure of 6,000 psi or 42,550 kPag. Due to the mountainous terrain, the main pipeline had a pressure of 1000 psi (7000 kPag) due to the static head before commencing pressurisation. Pressurisation was achieved using a Halliburton rig pump to a test pressure of 61,200 kPag – a whisker over 9000 psi.
Multiple gas distribution pipelines for Energex.
HTS personnel have tested many pipeline sections for Energex. This includes the South Coast Supply Project comprising approximately 13km of DN200 streetworks in the southern outskirts of Brisbane. Due to the small nature of each project, particular emphasis was placed on containing costs with satisfactory feedback from the client in this regard.
Narrabri Power Ltd Gas Gathering System.
This natural gas system running from natural gas wells to the Narrabri Power Station in western NSW comprises 15km of DN150 pipe with an MAOP of 9,900 kPag.
This natural gas pipeline runs from Spring Gully to Wallumbilla in Central Queensland and comprises 87 km of DN300 with an MAOP of 15,300 kPag. The line was tested in a single section in close coordination with the construction contractor and client. Of note were the dewatering and drying operations which were performed with natural gas rather than the conventional dried air.