Remote
Work location
Contract Pressure Vessel Engineer (PE) — ASME Section VIII Div 1 / PVHO-1 Ended
About the job
Summary
We manufacture premium hard-shell mild hyperbaric chambers. We have a Ø74 in (1930 mm) 304L stainless chamber, MAWP 14.7 psig, that is ready to fabricate.
This is an engineering role, not a CAD role. We have established the designs we fabricate these overseas. We have STEP files and solidworks files. We need to firm up the metal shop plans and conduct a proper analysis for the unit to be safe.
A prior contractor delivered a drawing package and an FEA that did not survive technical review. The head geometry is neither manufacturable nor code-compliant as drawn; the FEA reports a peak stress 2.6× material yield with no conclusion, and was run at a different diameter than the drawings. We are not asking anyone to design the project. We are asking you to finalize the drawings so we can move to production.
We are behind schedule. Shell fabrication is out for quotation now.
Code position — settled, not open for discussion
No ASME code stamp this round. No U-stamp fabrication, no Authorized Inspector, no National Board registration.
MAWP is 14.7 psig, below the 15 psi threshold in ASME VIII-1 U-1(c)(2) and below the exemption in Tennessee Code §68-122-105 for unfired pressure vessels.
The vessel will nonetheless be designed to ASME VIII-1 rules, with PE-sealed calculations. That is the point of this engagement.
ASME PVHO-1 applies as a design and documentation standard. There is no stamp program for it.
Your role is to fix the plants. Confirm that... read more
We manufacture premium hard-shell mild hyperbaric chambers. We have a Ø74 in (1930 mm) 304L stainless chamber, MAWP 14.7 psig, that is ready to fabricate.
This is an engineering role, not a CAD role. We have established the designs we fabricate these overseas. We have STEP files and solidworks files. We need to firm up the metal shop plans and conduct a proper analysis for the unit to be safe.
A prior contractor delivered a drawing package and an FEA that did not survive technical review. The head geometry is neither manufacturable nor code-compliant as drawn; the FEA reports a peak stress 2.6× material yield with no conclusion, and was run at a different diameter than the drawings. We are not asking anyone to design the project. We are asking you to finalize the drawings so we can move to production.
We are behind schedule. Shell fabrication is out for quotation now.
Code position — settled, not open for discussion
No ASME code stamp this round. No U-stamp fabrication, no Authorized Inspector, no National Board registration.
MAWP is 14.7 psig, below the 15 psi threshold in ASME VIII-1 U-1(c)(2) and below the exemption in Tennessee Code §68-122-105 for unfired pressure vessels.
The vessel will nonetheless be designed to ASME VIII-1 rules, with PE-sealed calculations. That is the point of this engagement.
ASME PVHO-1 applies as a design and documentation standard. There is no stamp program for it.
Your role is to fix the plants. Confirm that... read more
Summary
We manufacture premium hard-shell mild hyperbaric chambers. We have a Ø74 in (1930 mm) 304L stainless chamber, MAWP 14.7 psig, that is ready to fabricate.
This is an engineering role, not a CAD role. We have established the designs we fabricate these overseas. We have STEP files and solidworks files. We need to firm up the metal shop plans and conduct a proper analysis for the unit to be safe.
A prior contractor delivered a drawing package and an FEA that did not survive technical review. The head geometry is neither manufacturable nor code-compliant as drawn; the FEA reports a peak stress 2.6× material yield with no conclusion, and was run at a different diameter than the drawings. We are not asking anyone to design the project. We are asking you to finalize the drawings so we can move to production.
We are behind schedule. Shell fabrication is out for quotation now.
Code position — settled, not open for discussion
No ASME code stamp this round. No U-stamp fabrication, no Authorized Inspector, no National Board registration.
MAWP is 14.7 psig, below the 15 psi threshold in ASME VIII-1 U-1(c)(2) and below the exemption in Tennessee Code §68-122-105 for unfired pressure vessels.
The vessel will nonetheless be designed to ASME VIII-1 rules, with PE-sealed calculations. That is the point of this engagement.
ASME PVHO-1 applies as a design and documentation standard. There is no stamp program for it.
Your role is to fix the plants. Confirm that our calculations are correct. It's preferred for you to have a P professional engineering license. As the next step will be to get a U stamp.
We have 0.3 psi of headroom to the 15 psi threshold. Where MAWP and the relief device set pressure land is a design-basis decision we want stated once, in writing, and held.
The immediate problem
The chamber head as currently modelled is an annular dish:
Parameter As modelled
Outside diameter Ø74.00000
Central opening Ø38.5716 in (979.7 mm) — 50.8% of head diameter
Wall thickness 10 gauge & 7 gauge
The shell is not in question.
Scope of work
Phase 1 — Design basis and head specification (critical path)
Establish and document the design basis: MAWP, design temperature, corrosion allowance, cycle count, material specification, joint efficiency, relief device set pressure, and the governing code path.
Specify the head form and thickness by calculation. Candidate forms scoped on our side — ASME F&D, 2:1 semi-elliptical, or flat annular closure plate — but the choice and its justification are yours. Head depth drives overall chamber length and therefore the floor group, rib set and rail mounts, so state the dimensional consequence of your choice.
Design the reinforcement for the Ø38.57 in central opening. State your intended route before starting — design-by-rule, U-2(g), Appendix 1-10, or design-by-analysis per VIII-2 Part 5.
Assess whether a UG-101 proof test is the better route to establish MAWP. Since no stamp is being pursued and the head geometry is not reached by design-by-rule, we want proof testing evaluated as a genuine alternative to a design-by-analysis argument, not dismissed. Tell us what it would require.
Phase 2 — Balance of pressure boundary
Reinforcement design for the side opening in the shell: 53.875 × 18.000 in on the OD, corner radii R3.937 in, centred at 171°04′. Internal and external rings are modelled but carry mismatched forming radii (R108.218 vs R81.601) and do not seat.
Head rib grid: confirm whether required at your specified head thickness, and size it if so. Currently 8 left / 8 right at 12.7 mm.
Closure ring group and door interface: internal ring 25 mm, external ring 10 mm. Sealing arrangement is undefined — no gasket, groove or fastener detail exists in the model.
Bolting, if applicable.
Hydrostatic test pressure and the test-condition stress check.
Weld joint efficiency, NDE extent, and any PWHT position.
Confirm whether acrylic glazing exists in the design. A Panel Frame sits 1.37 in off the shell ID with no glazing, gasket or fastener modelled. If there is a viewport, PVHO-1 Section 2 applies and needs to be in scope.
Deliverables
Design basis memo (Phase 1, first deliverable).
Sealed and signed calculation set covering every item above, in a form a fabricator can build from and a third party can check.
Geometry specification — dimensioned definition of each pressure-boundary component sufficient for our draftsman to produce manufacturing drawings without interpretation. Sketches, tables and annotated screenshots are fine. We do not need CAD files from you.
If FEA is used: full stress linearization and classification per VIII-2 Part 5, with paths shown, allowables stated, and a written conclusion. Not a contour plot.
Written statement of every assumption we need to verify. read less
We manufacture premium hard-shell mild hyperbaric chambers. We have a Ø74 in (1930 mm) 304L stainless chamber, MAWP 14.7 psig, that is ready to fabricate.
This is an engineering role, not a CAD role. We have established the designs we fabricate these overseas. We have STEP files and solidworks files. We need to firm up the metal shop plans and conduct a proper analysis for the unit to be safe.
A prior contractor delivered a drawing package and an FEA that did not survive technical review. The head geometry is neither manufacturable nor code-compliant as drawn; the FEA reports a peak stress 2.6× material yield with no conclusion, and was run at a different diameter than the drawings. We are not asking anyone to design the project. We are asking you to finalize the drawings so we can move to production.
We are behind schedule. Shell fabrication is out for quotation now.
Code position — settled, not open for discussion
No ASME code stamp this round. No U-stamp fabrication, no Authorized Inspector, no National Board registration.
MAWP is 14.7 psig, below the 15 psi threshold in ASME VIII-1 U-1(c)(2) and below the exemption in Tennessee Code §68-122-105 for unfired pressure vessels.
The vessel will nonetheless be designed to ASME VIII-1 rules, with PE-sealed calculations. That is the point of this engagement.
ASME PVHO-1 applies as a design and documentation standard. There is no stamp program for it.
Your role is to fix the plants. Confirm that our calculations are correct. It's preferred for you to have a P professional engineering license. As the next step will be to get a U stamp.
We have 0.3 psi of headroom to the 15 psi threshold. Where MAWP and the relief device set pressure land is a design-basis decision we want stated once, in writing, and held.
The immediate problem
The chamber head as currently modelled is an annular dish:
Parameter As modelled
Outside diameter Ø74.00000
Central opening Ø38.5716 in (979.7 mm) — 50.8% of head diameter
Wall thickness 10 gauge & 7 gauge
The shell is not in question.
Scope of work
Phase 1 — Design basis and head specification (critical path)
Establish and document the design basis: MAWP, design temperature, corrosion allowance, cycle count, material specification, joint efficiency, relief device set pressure, and the governing code path.
Specify the head form and thickness by calculation. Candidate forms scoped on our side — ASME F&D, 2:1 semi-elliptical, or flat annular closure plate — but the choice and its justification are yours. Head depth drives overall chamber length and therefore the floor group, rib set and rail mounts, so state the dimensional consequence of your choice.
Design the reinforcement for the Ø38.57 in central opening. State your intended route before starting — design-by-rule, U-2(g), Appendix 1-10, or design-by-analysis per VIII-2 Part 5.
Assess whether a UG-101 proof test is the better route to establish MAWP. Since no stamp is being pursued and the head geometry is not reached by design-by-rule, we want proof testing evaluated as a genuine alternative to a design-by-analysis argument, not dismissed. Tell us what it would require.
Phase 2 — Balance of pressure boundary
Reinforcement design for the side opening in the shell: 53.875 × 18.000 in on the OD, corner radii R3.937 in, centred at 171°04′. Internal and external rings are modelled but carry mismatched forming radii (R108.218 vs R81.601) and do not seat.
Head rib grid: confirm whether required at your specified head thickness, and size it if so. Currently 8 left / 8 right at 12.7 mm.
Closure ring group and door interface: internal ring 25 mm, external ring 10 mm. Sealing arrangement is undefined — no gasket, groove or fastener detail exists in the model.
Bolting, if applicable.
Hydrostatic test pressure and the test-condition stress check.
Weld joint efficiency, NDE extent, and any PWHT position.
Confirm whether acrylic glazing exists in the design. A Panel Frame sits 1.37 in off the shell ID with no glazing, gasket or fastener modelled. If there is a viewport, PVHO-1 Section 2 applies and needs to be in scope.
Deliverables
Design basis memo (Phase 1, first deliverable).
Sealed and signed calculation set covering every item above, in a form a fabricator can build from and a third party can check.
Geometry specification — dimensioned definition of each pressure-boundary component sufficient for our draftsman to produce manufacturing drawings without interpretation. Sketches, tables and annotated screenshots are fine. We do not need CAD files from you.
If FEA is used: full stress linearization and classification per VIII-2 Part 5, with paths shown, allowables stated, and a written conclusion. Not a contour plot.
Written statement of every assumption we need to verify. read less
Summary
We manufacture premium hard-shell mild hyperbaric chambers. We have a Ø74 in (1930 mm) 304L stainless chamber, MAWP 14.7 psig, that is ready to fabricate.
This is an engineering role, not a CAD role. We have established the designs we fabricate these overseas. We have STEP files and solidworks files. We need to firm up the metal shop plans and conduct a proper analysis for the unit t... read more
We manufacture premium hard-shell mild hyperbaric chambers. We have a Ø74 in (1930 mm) 304L stainless chamber, MAWP 14.7 psig, that is ready to fabricate.
This is an engineering role, not a CAD role. We have established the designs we fabricate these overseas. We have STEP files and solidworks files. We need to firm up the metal shop plans and conduct a proper analysis for the unit t... read more
Summary
We manufacture premium hard-shell mild hyperbaric chambers. We have a Ø74 in (1930 mm) 304L stainless chamber, MAWP 14.7 psig, that is ready to fabricate.
This is an engineering role, not a CAD role. We have established the designs we fabricate these overseas. We have STEP files and solidworks files. We need to firm up the metal shop plans and conduct a proper analysis for the unit to be safe.
A prior contractor delivered a drawing package and an FEA that did not survive technical review. The head geometry is neither manufacturable nor code-compliant as drawn; the FEA reports a peak stress 2.6× material yield with no conclusion, and was run at a different diameter than the drawings. We are not asking anyone to design the project. We are asking you to finalize the drawings so we can move to production.
We are behind schedule. Shell fabrication is out for quotation now.
Code position — settled, not open for discussion
No ASME code stamp this round. No U-stamp fabrication, no Authorized Inspector, no National Board registration.
MAWP is 14.7 psig, below the 15 psi threshold in ASME VIII-1 U-1(c)(2) and below the exemption in Tennessee Code §68-122-105 for unfired pressure vessels.
The vessel will nonetheless be designed to ASME VIII-1 rules, with PE-sealed calculations. That is the point of this engagement.
ASME PVHO-1 applies as a design and documentation standard. There is no stamp program for it.
Your role is to fix the plants. Confirm that our calculations are correct. It's preferred for you to have a P professional engineering license. As the next step will be to get a U stamp.
We have 0.3 psi of headroom to the 15 psi threshold. Where MAWP and the relief device set pressure land is a design-basis decision we want stated once, in writing, and held.
The immediate problem
The chamber head as currently modelled is an annular dish:
Parameter As modelled
Outside diameter Ø74.00000
Central opening Ø38.5716 in (979.7 mm) — 50.8% of head diameter
Wall thickness 10 gauge & 7 gauge
The shell is not in question.
Scope of work
Phase 1 — Design basis and head specification (critical path)
Establish and document the design basis: MAWP, design temperature, corrosion allowance, cycle count, material specification, joint efficiency, relief device set pressure, and the governing code path.
Specify the head form and thickness by calculation. Candidate forms scoped on our side — ASME F&D, 2:1 semi-elliptical, or flat annular closure plate — but the choice and its justification are yours. Head depth drives overall chamber length and therefore the floor group, rib set and rail mounts, so state the dimensional consequence of your choice.
Design the reinforcement for the Ø38.57 in central opening. State your intended route before starting — design-by-rule, U-2(g), Appendix 1-10, or design-by-analysis per VIII-2 Part 5.
Assess whether a UG-101 proof test is the better route to establish MAWP. Since no stamp is being pursued and the head geometry is not reached by design-by-rule, we want proof testing evaluated as a genuine alternative to a design-by-analysis argument, not dismissed. Tell us what it would require.
Phase 2 — Balance of pressure boundary
Reinforcement design for the side opening in the shell: 53.875 × 18.000 in on the OD, corner radii R3.937 in, centred at 171°04′. Internal and external rings are modelled but carry mismatched forming radii (R108.218 vs R81.601) and do not seat.
Head rib grid: confirm whether required at your specified head thickness, and size it if so. Currently 8 left / 8 right at 12.7 mm.
Closure ring group and door interface: internal ring 25 mm, external ring 10 mm. Sealing arrangement is undefined — no gasket, groove or fastener detail exists in the model.
Bolting, if applicable.
Hydrostatic test pressure and the test-condition stress check.
Weld joint efficiency, NDE extent, and any PWHT position.
Confirm whether acrylic glazing exists in the design. A Panel Frame sits 1.37 in off the shell ID with no glazing, gasket or fastener modelled. If there is a viewport, PVHO-1 Section 2 applies and needs to be in scope.
Deliverables
Design basis memo (Phase 1, first deliverable).
Sealed and signed calculation set covering every item above, in a form a fabricator can build from and a third party can check.
Geometry specification — dimensioned definition of each pressure-boundary component sufficient for our draftsman to produce manufacturing drawings without interpretation. Sketches, tables and annotated screenshots are fine. We do not need CAD files from you.
If FEA is used: full stress linearization and classification per VIII-2 Part 5, with paths shown, allowables stated, and a written conclusion. Not a contour plot.
Written statement of every assumption we need to verify. read less
We manufacture premium hard-shell mild hyperbaric chambers. We have a Ø74 in (1930 mm) 304L stainless chamber, MAWP 14.7 psig, that is ready to fabricate.
This is an engineering role, not a CAD role. We have established the designs we fabricate these overseas. We have STEP files and solidworks files. We need to firm up the metal shop plans and conduct a proper analysis for the unit to be safe.
A prior contractor delivered a drawing package and an FEA that did not survive technical review. The head geometry is neither manufacturable nor code-compliant as drawn; the FEA reports a peak stress 2.6× material yield with no conclusion, and was run at a different diameter than the drawings. We are not asking anyone to design the project. We are asking you to finalize the drawings so we can move to production.
We are behind schedule. Shell fabrication is out for quotation now.
Code position — settled, not open for discussion
No ASME code stamp this round. No U-stamp fabrication, no Authorized Inspector, no National Board registration.
MAWP is 14.7 psig, below the 15 psi threshold in ASME VIII-1 U-1(c)(2) and below the exemption in Tennessee Code §68-122-105 for unfired pressure vessels.
The vessel will nonetheless be designed to ASME VIII-1 rules, with PE-sealed calculations. That is the point of this engagement.
ASME PVHO-1 applies as a design and documentation standard. There is no stamp program for it.
Your role is to fix the plants. Confirm that our calculations are correct. It's preferred for you to have a P professional engineering license. As the next step will be to get a U stamp.
We have 0.3 psi of headroom to the 15 psi threshold. Where MAWP and the relief device set pressure land is a design-basis decision we want stated once, in writing, and held.
The immediate problem
The chamber head as currently modelled is an annular dish:
Parameter As modelled
Outside diameter Ø74.00000
Central opening Ø38.5716 in (979.7 mm) — 50.8% of head diameter
Wall thickness 10 gauge & 7 gauge
The shell is not in question.
Scope of work
Phase 1 — Design basis and head specification (critical path)
Establish and document the design basis: MAWP, design temperature, corrosion allowance, cycle count, material specification, joint efficiency, relief device set pressure, and the governing code path.
Specify the head form and thickness by calculation. Candidate forms scoped on our side — ASME F&D, 2:1 semi-elliptical, or flat annular closure plate — but the choice and its justification are yours. Head depth drives overall chamber length and therefore the floor group, rib set and rail mounts, so state the dimensional consequence of your choice.
Design the reinforcement for the Ø38.57 in central opening. State your intended route before starting — design-by-rule, U-2(g), Appendix 1-10, or design-by-analysis per VIII-2 Part 5.
Assess whether a UG-101 proof test is the better route to establish MAWP. Since no stamp is being pursued and the head geometry is not reached by design-by-rule, we want proof testing evaluated as a genuine alternative to a design-by-analysis argument, not dismissed. Tell us what it would require.
Phase 2 — Balance of pressure boundary
Reinforcement design for the side opening in the shell: 53.875 × 18.000 in on the OD, corner radii R3.937 in, centred at 171°04′. Internal and external rings are modelled but carry mismatched forming radii (R108.218 vs R81.601) and do not seat.
Head rib grid: confirm whether required at your specified head thickness, and size it if so. Currently 8 left / 8 right at 12.7 mm.
Closure ring group and door interface: internal ring 25 mm, external ring 10 mm. Sealing arrangement is undefined — no gasket, groove or fastener detail exists in the model.
Bolting, if applicable.
Hydrostatic test pressure and the test-condition stress check.
Weld joint efficiency, NDE extent, and any PWHT position.
Confirm whether acrylic glazing exists in the design. A Panel Frame sits 1.37 in off the shell ID with no glazing, gasket or fastener modelled. If there is a viewport, PVHO-1 Section 2 applies and needs to be in scope.
Deliverables
Design basis memo (Phase 1, first deliverable).
Sealed and signed calculation set covering every item above, in a form a fabricator can build from and a third party can check.
Geometry specification — dimensioned definition of each pressure-boundary component sufficient for our draftsman to produce manufacturing drawings without interpretation. Sketches, tables and annotated screenshots are fine. We do not need CAD files from you.
If FEA is used: full stress linearization and classification per VIII-2 Part 5, with paths shown, allowables stated, and a written conclusion. Not a contour plot.
Written statement of every assumption we need to verify. read less
Things to know
Expert
Skill Level
Open budget
Hourly
Full-time
Job type
1-3 months
Job duration
Areas of expertise
2D & 3D Engineering Design
2D & 3D Modeling
3D CAD Simulations
Structural Design
Structural Engineering
+2 more
Job categories
2D CAD Design Services
Engineering Design
Mechanical CAD Design
Mechanical Engineering
+1 more
About the client
Payment ready
United States (11:06 pm)
Posted
Active
Job activity
30 Applicants
4 interviews in progress
10 unanswered invites
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