Green Car Congress  
Go to GCC Discussions forum About GCC Contact  RSS Subscribe Twitter headlines

« DOE selects Babcock & Wilcox for Small Modular Reactor program | Main | DOE awards $2M to thin-film solar module company Stion »

Print this post

Studies find oil sands-derived crude oil no more corrosive in pipelines than other crudes

21 November 2012

Both scientific research and industrial experience have found that bitumen-derived crude oil (i.e., crude from the oil sands) is no more corrosive in transmission pipelines than other crudes, according to Natural Resources Canada (NRC).

ASTM International recently published a guide (G205) for measuring the corrosivity of crude oil under pipeline conditions, based on research conducted by several organizations including the CANMET Laboratories of NRC.

Guide G205 is a step toward the creation of an industry-wide standard test to measure the corrosivity of different crude oils under pipeline conditions, since it describes test methods that enable a direct comparison of the corrosivity of crude oils from various sources.

Measurements obtained from these tests indicate that the corrosivity of oil sands-derived crudes is no different than that of other crudes.

In the absence of water, the crude oil is noncorrosive. The presence of sediment and water makes crude oil corrosive...The corrosivity of crude oil containing water can be determined by a combination of three properties: the type of emulsion formed between oil and water, the wettability of the steel surface, and the corrosivity of water phase in the presence of oil.

—ASTM G205

The low corrosivity of crude oils—including bitumen-derived crude in transmission pipelines regulated by Canada’s National Energy Board—is due to the fact that corrosive (water) and erosive (mud, sand) constituents are largely removed upstream of the pipelines as part of achieving transport quality specifications. For transport in transmission pipelines, the sand and water content of the oil is controlled, and the combined basic sediment and water content must be less than 0.5% by volume.

Crude oils, including bitumen-derived crudes, contain little or no carbon dioxide (CO2) or hydrogen sulfide (H2S), noted NRC. Furthermore, these transmission pipelines operate at temperatures below 60°C. Consequently, naphthenic acid and sulphur compounds that can cause corrosion under refinery conditions (>200°C) do not cause corrosion in pipelines.

Pipelines carrying bitumen-derived crude oil operate at approximately the same pressure levels as pipelines carrying other crude oils, Canada’s NRC said.

November 21, 2012 in Brief | Permalink | Comments (0) | TrackBack (0)

TrackBack

TrackBack URL for this entry:
http://www.typepad.com/services/trackback/6a00d8341c4fbe53ef017d3e017562970c

Listed below are links to weblogs that reference Studies find oil sands-derived crude oil no more corrosive in pipelines than other crudes:

Comments

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Working...
Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.

Working...

Post a comment

Green Car Congress © 2014 BioAge Group, LLC. All Rights Reserved. | Home | BioAge Group