MDR form UA1

[israr ahmed]

Dear Team,

Can anybody suggest for below detail required to fill in MDR of U Stamp Pressure Vessel.

Abbreviations used:  NA-Not applicable, MOC-Material of construction, DOE-Degree of examination, RT-Radiographic test,

H.T - Heat Treatment

All Dimensions are in mm, Pressure in Psi(g) (MPa(g)) & Temperature in °F  (°C).

Hydrotest position is Vertical.

Note 1- Nozzle to Shell / Head attachment weld with R.F.Pad as per Fig. UW-16.1(C-1), category 'D',Type No.7, DOE-Visual,

RT-None, Joint efficiency-NA

Note 2-Nozzle to Head attachment weld with R.F.Pad & intrnal projection as per Fig. UW-16.1(c-1), category 'D', Type No.7,

DOE-Visual, RT-None, Joint efficiency-NA

Note 3- Nozzle to Head attachment attachment weld  as per Fig. UW-16.1(c), category 'D', Type No.7,  DOE-Visual,

RT-None, Joint efficiency-NA

Note 4-Nozzle to shell attachment weld with R.F.Pad as per Fig. UW-16.1(d-1), category 'D',Type No.7, DOE-Visual,

RT-None, Joint efficiency-NA

Note 5- Nozzle to shell attachment weld as per Fig. UW-16.1(p-2), category 'D', Type No.7,  DOE-Visual, RT-None,

Joint efficiency-NA

Note 6 - Nozzle to flange attachment weld (Category 'C' weld) - Type No.(1), RT- exempted as per UW-11(a), DOE-Visual,

Joint efficiency-1.00

Note 7 - Nozzle to flange attachment weld (Category 'C' weld) - Type No.(1), RT-Full as per UW-11(a), DOE-Visual,

Joint efficiency-1.00

Vessel is under corrosive service hence Inspection Openings are provided as per UG-46(f)(3) & UG-46(g)(1)

Vessel is under corrosive service, Drain opening Nozzle N2 (DN 200) is provided as per UG-25(f).

Post Forming Heat Treatment (PFHT) exempted for Shell, Head & Manhole Neck  as per UG-79 & UCS-79.

Post Weld Heat Treatment (PWHT) Exempted as per UW-2, UCS-56.

Impact Test is exempted as per- UG-20(f), UCS-66(a) &  FIGURE UCS-66M, UCS-66(c)' FIGURE UCS-66 GENERAL NOTE (c),

UCS-67(a).

Special Service - None.

Over pressure protection device is not directly mounted on vessel,  Design supply of pressure safety device is not in

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Israr Ahmed Noor Mohammed
+919930308261

[Deerendra Karanth]

Dear Israr, 

The following details are necessary to be included in the "Remarks" section when preparing the Manufacturer’s Data Report (MDR) for a U Stamp Pressure Vessel. Below is an interpretation and a list of suggestions based on the provided information:

Suggestions and Notes:

1. Abbreviations: Ensure abbreviations (e.g., NA, MOC, DOE, etc.) are clearly defined in the MDR for better comprehension by reviewers and inspectors.

2. Hydrotest: Specify that the hydrotest position is vertical and include this detail explicitly in the MDR under the "Hydrostatic Test Details" section.

3. Nozzle and Weld Details:

Incorporate the weld details (e.g., Category, Type, DOE, RT, and Joint Efficiency) from Notes (1 to 7) into the respective nozzle information sections of the MDR.

Ensure visual examination (DOE) records are properly documented and included.

4. Corrosive Service:

Document compliance with UG-46(f)(3) and UG-46(g)(1) for inspection openings.

Clearly state the provision of a drain opening nozzle (N2) as per UG-25(f).

5. Heat Treatments (HT):

Include exemptions for PFHT (Post Forming Heat Treatment) and PWHT (Post Weld Heat Treatment) as per UG-79, UCS-79, UW-2, and UCS-56 in the "Material and Welding" section.

6. Impact Test Exemption: Clearly reference UG-20(f), UCS-66(a), UCS-66(c), and UCS-67(a) exemptions and include supporting documentation.

7. Special Service: Indicate "None" under the "Special Service" section since the vessel is not under any special service.

8. Overpressure Protection Device: Mention that the design and supply of the overpressure protection device are outside the manufacturer’s scope.

9. Design Details: Ensure the MDR includes:

Vessel design temperature and pressure.

Corrosion allowance, if applicable.

All dimensional details in the specified units (mm, Psi(g), °C).

10. Appendices: Attach all relevant documents, including reference drawings, weld maps, test records, and ASME code references (e.g., Fig. UW-16.1, UCS-66).

11. Joint Efficiency: State "NA" where not applicable and "1.00" where full joint efficiency is achieved (e.g., Category 'C' welds).

12. Supporting Calculations: Include calculations for material thickness, stress analysis, and nozzle reinforcement, as required.

Note: Verify with your design team to ensure no specific details related to design calculations or FEA analysis have been missed. Typically, the design team prepares and submits these details during the nameplate stamping and final MDR verification by the Authorized Inspector (AI).

BR, 

Deerendra 

9112146005 

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