Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

03314 FLOW ASSURANCE OF pH STABILIZED WET GAS PIPELINES

Picture for 03314 FLOW ASSURANCE OF pH STABILIZED
Available for download
Product Number: 51300-03314-SG
ISBN: 03314 2003 CP
Author: Arne Dugstad, Rolf Nyborg and Marion Seiersten
$0.00
$20.00
$20.00
The pH-stabilization method is a cost effective and reliable way to control bottom of line corrosion in gas/condensate pipelines where glycol is used as hydrate preventer. Increasing the pH to 6.5-7.5 facilitates the formation of a protective iron carbonate film on the steel surface and reduces corrosion of the steel. pH stabilization will also affect top-of-line corrosion, but to a less extent than in the bottom of the line. In order to reduce top-of-the-line corrosion significantly, pH stabilized glycol must be transported from the liquid water/glycol phase in the bottom of the pipeline to the gas phase in droplets and then hit the wall. The likelihood for this is discussed and it is also discussed how the pH stabilizer can reduce the detrimental effect of HAc in the gas. The carry-over of formation water will put limits on the use of the pH stabilization technique as carbonate scale may form. Scale formation in glycol carrying pipelines is not easy to predict, as solubility data for CO2 and scale forming compounds in glycol solutions are very scarce. Glycol affects scale formation by changing the solubility and the precipitation kinetics, and the solubility of for instance calcium carbonate is markedly reduced. If the periods with formation water carry-over into a pH-stabilized pipeline are short, scale inhibitors can probably be applied without adverse effects on corrosion. Long-term use of scale inhibitors in a pH stabilized pipeline is probably not feasible. Keywords: CO2 corrosion, pH stabilization, formation water, glycol
The pH-stabilization method is a cost effective and reliable way to control bottom of line corrosion in gas/condensate pipelines where glycol is used as hydrate preventer. Increasing the pH to 6.5-7.5 facilitates the formation of a protective iron carbonate film on the steel surface and reduces corrosion of the steel. pH stabilization will also affect top-of-line corrosion, but to a less extent than in the bottom of the line. In order to reduce top-of-the-line corrosion significantly, pH stabilized glycol must be transported from the liquid water/glycol phase in the bottom of the pipeline to the gas phase in droplets and then hit the wall. The likelihood for this is discussed and it is also discussed how the pH stabilizer can reduce the detrimental effect of HAc in the gas. The carry-over of formation water will put limits on the use of the pH stabilization technique as carbonate scale may form. Scale formation in glycol carrying pipelines is not easy to predict, as solubility data for CO2 and scale forming compounds in glycol solutions are very scarce. Glycol affects scale formation by changing the solubility and the precipitation kinetics, and the solubility of for instance calcium carbonate is markedly reduced. If the periods with formation water carry-over into a pH-stabilized pipeline are short, scale inhibitors can probably be applied without adverse effects on corrosion. Long-term use of scale inhibitors in a pH stabilized pipeline is probably not feasible. Keywords: CO2 corrosion, pH stabilization, formation water, glycol
PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for 99020 EFFICIENT CORROSION CONTROL OF GAS
Available for download

99020 EFFICIENT CORROSION CONTROL OF GAS CONDENSATE PIPELINES BY pH-STABILISATION

Product Number: 51300-99020-SG
ISBN: 99020 1999 CP
Author: Arne Dugstad and Per-Erik Dronen
$20.00
Picture for 99019 pH-STABIIJZATION IN THE TROLL GAS-CONDENSATE
Available for download

99019 pH-STABIIIZATION IN THE TROLL GAS-CONDENSATE PIPELINES

Product Number: 51300-99019-SG
ISBN: 99019 1999 CP
Author: Stein Olsen, Olav Lunde, Arne Dugstad
$20.00
Picture for 03328 CORROSION CONTROL BY pH STABILISER
Available for download

03328 CORROSION CONTROL BY pH STABILISER, MATERIALS AND CORROSION MONITORING IN A 160 KM MULTIPHASE OFFSHORE PIPELINE

Product Number: 51300-03328-SG
ISBN: 03328 2003 CP
Author: Odd Hagerup, Stein Olsen
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support