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Titanium Flange rating
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MVPs
(Mechanical)
(OP)
7 Oct 04 08:06Hi All,
I am trying to get info on Ti Grd 12 flanges, I need to check the maxium pressure at temp. I cannot find the material group in ASME B16.5 to check the derating from the tables. Does anyone have info on the subject, or must the press/temp rating be calculated from scratch?
Thanks in advance.
Rob
(Mechanical)
9 Oct 04 20:39Whoa...never knew a guy could get a titanium flange. I bet this would cost a guy the farm, aye?
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada
(Mechanical)
11 Oct 04 19:42Ti flanges are made from Gr 1 & 2, but I know nothing about grade 12.
Ti flanges can be found for regular ratings 150#, etc but the temperature range is only up to 500 deg F
Several places in the states can also machine Ti flanges for you and have engr on staff give you the information you desire.
(Mechanical)
(OP)
13 Oct 04 01:39Hi MIEngr,
Thanks for the reply.
The plant we are building is a Copper Refinery in Loas, the medium is at 244 deg C and 5450kPAg. The medium is a Raffinate off gas, pretty nasty stuff. The grade of Titanium that we are using is an AMSE B31.1 specified material, as it appears too be the only grade able to withstand the pressures at these temperatures under the attack of the medium. The flanges are lap-type with CS backing rings. We have sent off requests for information too a few Ti manufactures in the states and have had no joy. An enquiry to the ASME board reveals that we will have to calculate the flange's pressure/temp ratings from scratch using the B16.5 dimensions.
I was wondering if anyone may have dealt with this situation in the past and has a table already calculated. We have in the mean time extropalated, in comparison with a similar material, and using a ramp factor, the data and will perform more detailed calcs if required.
Oh and thanks to Coachroach for his informative reply, I would like to say more, but here in SA we have a code against bringing a fellow PR Eng into disrepute
(Mechanical)
13 Oct 04 11:28Rjstephens,
"The flanges are lap-type with CS backing rings." This tells me that this is a titanium stub end with a loose back up flange of carbon steel. This is a lot less cost than a solid titanium flange. I would consider the carbon steel flange as the pressure limiting component. Pressure rating of the flange joint would for ASME B16.5 CL600 to be 8274 kPa @ 260 deg C for group 1.1 forged A105 steel backup flange.
For external corrosion resistance you might want to consider using 304 SS backup flange and teflon coated gr B7 bolts.
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INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS
FIRST NAME
*
LAST NAME
*
*
MESSAGE
*
ADDITIONAL DETAILS
Thanks. We have received your request and will respond promptly.
Log In
Are you an
Engineering professional?
Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.
Promoting, selling, recruiting, coursework and thesis posting is forbidden.
Eng-Tips Posting Policies
Titanium Flange rating
thread378-105069 Forum Search FAQs Links MVPsForum
Search
FAQs
Links
MVPs
(Mechanical)
(OP)
7 Oct 04 08:06Hi All,
I am trying to get info on Ti Grd 12 flanges, I need to check the maxium pressure at temp. I cannot find the material group in ASME B16.5 to check the derating from the tables. Does anyone have info on the subject, or must the press/temp rating be calculated from scratch?
Thanks in advance.
Rob
(Mechanical)
9 Oct 04 20:39Whoa...never knew a guy could get a titanium flangetitanium flange. I bet this would cost a guy the farm, aye?
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada
(Mechanical)
11 Oct 04 19:42Ti flanges are made from Gr 1 & 2, but I know nothing about grade 12.
Ti flanges can be found for regular ratings 150#, etc but the temperature range is only up to 500 deg F
Several places in the states can also machine Ti flanges for you and have engr on staff give you the information you desire.
(Mechanical)
(OP)
13 Oct 04 01:39Hi MIEngr,
Thanks for the reply.
The plant we are building is a Copper Refinery in Loas, the medium is at 244 deg C and 5450kPAg. The medium is a Raffinate off gas, pretty nasty stuff. The grade of Titanium that we are using is an AMSE B31.1 specified material, as it appears too be the only grade able to withstand the pressures at these temperatures under the attack of the medium. The flanges are lap-type with CS backing rings. We have sent off requests for information too a few Ti manufactures in the states and have had no joy. An enquiry to the ASME board reveals that we will have to calculate the flange's pressure/temp ratings from scratch using the B16.5 dimensions.
I was wondering if anyone may have dealt with this situation in the past and has a table already calculated. We have in the mean time extropalated, in comparison with a similar material, and using a ramp factor, the data and will perform more detailed calcs if required.
Oh and thanks to Coachroach for his informative reply, I would like to say more, but here in SA we have a code against bringing a fellow PR Eng into disrepute
(Mechanical)
13 Oct 04 11:28Rjstephens,
"The flanges are lap-type with CS backing rings." This tells me that this is a titanium stub end with a loose back up flange of carbon steel. This is a lot less cost than a solid titanium flange. I would consider the carbon steel flange as the pressure limiting component. Pressure rating of the flange joint would for ASME B16.5 CL600 to be 8274 kPa @ 260 deg C for group 1.1 forged A105 steel backup flange.
For external corrosion resistance you might want to consider using 304 SS backup flange and teflon coated gr B7 bolts.
Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.
Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.
Click Here to join Eng-Tips and talk with other members! Already a Member? Login