Impact Tests for Pressure Vessels

I wrote a program in excel that has impact stress on the lugs using ASME specs.........I actually think I came across it here on CR4.

If your interested, email end me your personal email. I'l sent it to you.

p911

Can you please share this excel programme to me as well, I am also intrested in this subject.

Thanks, have a nice day.

?

Please send on e-mail ID y_pal@in.com

Thanks a lot

y pal

I am intrested and please send the data to my mail sd610@rediffmail.com

dhayanandhan.s,

cr4 member,

india.

when the MDMT, specified as per your service condition, becomes warmer than rated MDMT, calculated as per UCS-66 of ASME section Div(1), then impact test is required. You may go through the code as there are exemptions for imacr testing despite of the above said indication.

For PWHT requirement, plaese go through UCS-56 of ASME section VIII Div (1)

Dear Sir

Your reply has really helped us to understand the subject in a better way. We have two numbers of old LPG Spheres fabricated during 1981-83 using A 516 Grade 70 material. During that time design temperature requirement was defined as -5 to 55 deg C. We are planning to dismantle and relocate the same to some other needy location but at present design tempretaure requirement is stipulated as -27 to 55 deg C. As per the Imact Test Exemption curves ,A 516 can withstand temp upto -27 to -28 deg C.

Query-1-Sphere was already been subjected to Hydrotest after every five years and once PWHT was carried out after bottom crown modification during 2004. Considering the above is it sufficient to conduct Imact test alone to certify the sphere material fit for relocation or any additonal tests also to be conducted.

Query -2-Sphere was fabricated with deisgn pressure 19.25 Kg/cm2 but present requirement is 14.5 Kg/cm2. Whether we can calcualte minimim thickness requirement based on the new design pressure without defining corresponding MDMT?

Query -3- Whether material can be certified confirming to A 516 based on the old reports obtained along with the supply of material without considering the amendments occured to A 516 (almost 25 times since adoption) or fresh mechanical, chemical tests are required to confirm to A 516 std.

Regards

SJK

• See Fig. UCS-66 Impact Test Exemption Curves as per ASME code, Section VIII, Division 1.

SAILM ALKIOM

Frankly, I'm proud of you since I read your articles and learned from many

Therefore I would like to know more

name: khaled manshawy

postion: project Eng. (Mech. )

Mob. 01006673218

comp: petrogulfmisr (Geisum)

suppose i have material used it at lower temperature system .

what are methods to applied for not using impact test? such as heat treatment,....etc

how applied it to used a material without impact test?

Dear khaled el sayed,

• The impact test is needed only if the min. design metal temp. of the material obtained from the curve Fig. UCS-66 (or Table UCS-66) and Curve Fig. UCS-66.1 and calculation as per Fig. UCS-66-2 is found higher than the MDMT of the system, otherwise the impact test is exempted.

• Fig. UCS-66.1 Reduction in Minimum Design Metal Temperature Without Impact Testing.

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• FIG. UCS-66.2 Diagram of UCS-66 Rules for Determining Lowest Minimum Design Metal Temperature (MDMT) Without Impact Testing.

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Dear Abdel Sir,

Thanks for ur wonderful effort sir,

Regards

Rajasekar.P

hi this is shiva in chennai. My mail id is ksp.shivan@gamil.com. I am also in Static equipment like (Pressure vessel and Heat excahnager). If you Have interest join our group.