I am buying or accepting a PCHE.
What should I do before that?

decision, not an assumption.

Before you specify, accept or take delivery of a PCHE, you need independent confirmation that the technology is right for the duty, that the proposal meets the specified conditions, and that the unit was actually built the way it was specified — in the factory, at the hold points, on your behalf.

White funnel icon with dots entering the top on a blue square background.

RightFit

Diffusion-welded plate fin and hybrids
This is some text inside of a div block.
Diffusion-welded etched plates
This is some text inside of a div block.
No items found.

Is a PCHE the right choice for this duty?

Independent technology selection, fit-for-duty and specification support to establish whether a PCHE is the right choice — and the optimal configuration — then define exactly what should be purchased.

  • We are evaluating bids on a technology we do not specify every day.
  • A PCHE has been proposed and nobody has independently confirmed it is the right choice for this duty.
  • Two proposals use different assumptions and there is no independent way to compare them like-for-like.
  • The specification was drafted by the same people it will be tendered to.
  • A specification that is wrong at this stage becomes the wrong yardstick for everything that follows.
  • A datasheet needs to define exactly what should be purchased, not just what is wanted.
Icon showing four white corner brackets forming a square around an orange check mark on a blue background.

ClearView

Check twice. Commission once.
This is some text inside of a div block.
Challenge the assumptions before commissioning does
This is some text inside of a div block.
A second look before the first problem
This is some text inside of a div block.
Before you commit, take a ClearView
This is some text inside of a div block.
No items found.

Who verifies the proposal before you accept it?

Independent thermal, hydraulic and mechanical verification of the proposed design against the actual duty, the applicable codes and the required operating envelope — before acceptance.

  • A proposal has arrived and no one has independently checked the numbers behind it.
  • Performance guarantees look good on paper, and commissioning is where untested assumptions get found out.
  • Compliance with the applicable code is claimed but not independently confirmed.
  • The design margin looks optimistic and no neutral party has reviewed it.
  • Flow distribution and maldistribution have been assumed, not independently checked.
  • Acceptance is approaching and the proposal has never been verified against the specified duty.
White hamburger menu icon above an orange check mark on a dark blue background.

TrueWeld

Tensile testing of diffusion-welded joints
This is some text inside of a div block.
Bend testing of diffusion-welded joints
This is some text inside of a div block.
Diffusion-weld qualification auditing
This is some text inside of a div block.
No items found.

How do you trust a bond you can never inspect again?

Independent oversight of diffusion-weld quality — inspection planning, manufacturing surveillance and factory acceptance testing, through to sign-off.

  • Once the block is diffusion-welded, that bond can never be inspected again.
  • A factory acceptance test is scheduled and no independent witness has been arranged.
  • Manufacturing is underway and no one is watching on the buyer's behalf.
  • A deviation request has arrived from the fabricator and needs an independent view.
  • Weld quality is being assured through paperwork alone, and nothing else.
  • Most buyers cannot economically place a specialist in the factory at every hold point.
learn more about

Provided
Perspectives.

Interior of a large industrial warehouse with green floor, overhead cranes, stacked pallets, machinery on both sides, and bright ceiling lights.
#TrueWeld

Most buyers cannot economically place a specialist in the factory at every hold point.

Putting a competent person in the factory for every hold point on a unit built overseas is rarely something an individual buyer can justify for one project. It is exactly the kind of gap an independent specialist, already positioned to do this work, closes economically.

Two businesspeople in suits at a table with clipboards, a laptop, and a tablet; one person gestures with a hand while the other writes with a pen.
#RightFit

Two proposals use different assumptions, and comparing them like-for-like is not simple.

A bid comparison assumes the numbers mean the same thing across vendors. On a technology most buyers do not specify every day, that assumption often does not hold — margins, test conditions and performance guarantees can all be defined differently, and the comparison quietly stops being fair.

Yellow crane arm on an offshore oil platform with pipes and lights, set against a calm ocean under a cloudy sunset sky.
#ClearView

Performance guarantees look good on paper. Commissioning is where untested assumptions get found out.

A guarantee is only as good as the assumptions behind it, and those assumptions are rarely tested before the unit is built. The gap between a guarantee on paper and a guarantee that holds up in operation tends to surface at commissioning — the most expensive place to find it.

Close-up of a scientific electron microscope with dual monitors displaying magnified images and data, used for detailed material analysis in a laboratory.
#TrueWeld

Once the block is diffusion-welded, that bond can never be inspected again.

A PCHE core becomes a single solid block the moment the diffusion weld is complete — no seam to reopen, no joint to re-examine, no second chance to check it. Whatever confidence exists in that bond has to be built before that point, through independent oversight of the weld itself, not after.

Two engineers collaborating at a desk in an office, one pointing at a computer screen displaying 3D mechanical parts while holding a component.
#RightFit

A specification that is wrong becomes the wrong yardstick for everything that follows.

Every later stage — the bid evaluation, the design verification, the acceptance test — measures against the specification written at the very start. Get that document wrong, and every downstream check is measuring against the wrong number, however carefully it is done.

Two construction workers wearing yellow hard hats and high-visibility vests inspecting equipment and discussing over a laptop under large industrial pipes in a mechanical room.
#ClearView

The design margin looks optimistic, and no neutral party has reviewed it.

A margin set by the same party trying to win the tender carries an obvious incentive to look generous. That does not make it wrong — but it does make it worth an independent check before it becomes the number everything else is built on.

Person using a calculator with one hand while writing on documents at a desk with keyboard and tablet in a bright office setting.
#RightFit

The specification was drafted by the same people it will be tendered to.

A specification is supposed to be a neutral yardstick. When it is written with input from the same organisation that will later bid against it, that neutrality is worth checking, not assuming.

get started

The unit cannot be opened. The decision still has to be made.

Before you accept it, or before you clean it — talk to us first.

Start a conversation
Back to homepage
Close-up of stacked zigzag metal plates creating a repeating chevron pattern.
Contact
General Inquiries:
info@dolumii.com
Suppliers & Procurement:
suppliers@dolumii.com
Legal:
legal@dolumii.com
Careers:
careers@dolumii.com
Bid Requests / RFQs:
rfq@dolumii.com
Whistleblowing & Compliance:
compliance@dolumii.com
Press & Media:
press@dolumii.com
Address
202, 33 Ijisandan-ro,
Gimhae, 50968,
Republic of Korea
Map Location
quick links
HomeAboutCareersNewsContactPrivacy PolicyTerms of Use
Map showing road network and a marked location in a city area with Korean text labels.
Dolumï company logo with stylized M and dot over it followed by the word Dolumï
© 2026 Dolumï Ltd. All Rights Reserved.

Cookie Settings

Privacy is important to us, which is why you have the option to disable certain types of data storage that are not necessary for the basic functioning of the website. Blocking certain categories may affect your experience on the website. More information

These elements are required to enable basic website functionality.

Always active

These elements are used to provide advertising that is more relevant to you and your interests.

These elements help us understand how the website works, how visitors interact with it, and whether there may be any technical issues.

Accept all
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.