- Why There Is No Published Percentage Score
- What "Passing" Actually Means for NITC Brazing Tests
- The Two Acceptance Gates: QB-141.6 and QB-181
- Choosing Between R78, R218 and R418
- Preparing Around the Seven Specification Headings
- Specification Rules That Quietly Fail Coupons
- What a Pass Attempt Costs
- Keeping Your Qualification After You Pass
- Source Discrepancies to Clarify Before Test Day
- A Domain-Sequenced Preparation Plan
- Frequently Asked Questions
- HVACR Brazing Processes is a performance qualification: no verified percentage cut score exists, so "passing" means acceptable coupons.
- Every brazement must pass visual examination under QB-141.6 and laboratory sectioning under QB-181.
- R78, R218 and R418 use 7/8, 2-1/8 and 4-1/8 inch test tube; each qualifies a different size range.
- No flux, no post-braze heat treatment, and oil-free dry nitrogen at 5-10 CFH until the joint is cool to the touch.
Why There Is No Published Percentage Score
Candidates searching for a "passing score" usually expect a number: 70 percent, a scaled 500, or some similar cut line. HVACR Brazing Processes does not work that way. It is a hands-on performance qualification administered by the National Inspection, Testing and Certification Corporation (NITC), and the primary sources we reviewed do not publish a percentage cut score, a question count, or weighted domain percentages.
That absence matters, so here is what we can and cannot say. We have not verified any official percentage weights, and we will not invent one. The seven headings attached to this credential (Base Metal, Brazing Filler Metal, Flow Position, Joint Design, Brazing Flux, Fuel Gas, or Atmosphere, Post Braze Heat Treatment, and Brazing Preparation, Assembly, Technique and Sectioning) are shared practical test-specification headings. They are useful preparation topics, but they are unweighted and do not establish an official exam-domain count or exhaustive coverage.
What "Passing" Actually Means for NITC Brazing Tests
In a performance qualification, you pass when the brazements you make meet the acceptance requirements written into the Braze Test Specification, and the Brazer Qualification Record is completed accordingly. The three test families are R78, R218 and R418, documented on Forms 720-116, 720-117 and 720-118 respectively, all at Rev 04-09-25 and all referencing BPS 18-R78 Revision 1. The qualification-record headings cite ASME Section IX and ASME B31.5, which is the refrigeration piping code context for this scope.
The assessment is manual torch brazing. You produce horizontal and vertical-upflow brazements, then the specimens are examined and sectioned. Your submission consists of correctly identified sectioned specimens plus completed qualification records. Mislabeled specimens or incomplete records are administrative failures you can prevent entirely.
If you are new to the credential itself, our overview pages, What Is HVACR Brazing Certification? and HVACR Brazing Requirements, cover eligibility and context.
The Two Acceptance Gates: QB-141.6 and QB-181
Think of passing as clearing two sequential gates. A coupon that fails either one does not qualify.
Gate 1: Visual Examination (QB-141.6)
The brazed joints are first inspected by eye. Visual acceptance is about the external condition of the joint.
- Filler metal should show complete, continuous flow around the joint.
- Overheated, oxidized, or burned base metal is a warning sign.
- Poor fillets, voids at the joint face, or incomplete filler penetration visible externally can end the attempt before sectioning.
Gate 2: Laboratory Sectioning (QB-181)
Joints that pass visual examination are sectioned and examined internally by a test laboratory.
- Sectioning reveals what the outside hides: voids, lack of penetration, flux-free joint quality, and filler distribution.
- A joint can look excellent externally and still fail here if heat control or clearance was poor.
- Specimens must be correctly identified so results attach to the right brazement.
The practical lesson: external beauty is not the goal. Inside the joint, filler must have been drawn by capillary action through the full engagement. Practice by sectioning your own coupons whenever you can.
Choosing Between R78, R218 and R418
The three tests differ by tube size, and your choice determines the range of Type ACR sizes you will be qualified to braze. Pick the test that matches the work your employer needs you to do.
| Test | Form | Test Tube OD | Type ACR Qualification Range (OD) |
|---|---|---|---|
| R78 | 720-116 | 7/8 inch | 1/8 through 1-1/8 inches |
| R218 | 720-117 | 2-1/8 inches | 1-1/8 through 3-1/8 inches |
| R418 | 720-118 | 4-1/8 inches | 2-1/8 through 4-1/8 inches |
One nuance: R218 permits either Type ACR tube or 2-inch Type L tube. Larger sizes demand more heat, more torch skill, and better heat management to bring both members to brazing temperature evenly. That is why many candidates start with R78 and build toward the larger tests. Our difficulty guide explains how skill demands scale with joint size.
Preparing Around the Seven Specification Headings
Because the headings are unweighted, treat all seven as required knowledge. Each one maps to a decision you make or a limit you must respect on the bench. For a deeper walkthrough, see the HVACR Brazing exam domains guide.
Domain 1: Base Metal
The specifications call for P-300 copper. Know what that designation means and that tube type and size must match the test you are taking.
- Distinguish Type ACR from Type L where the test allows it (R218).
- Understand how the base metal determines the qualification range you earn.
Domain 2: Brazing Filler Metal
The specifications permit BCuP 2 through 7 filler metals. These are copper-phosphorus family fillers suited to copper-to-copper joints without flux.
- Know why phosphorus makes the filler self-fluxing on copper.
- Recognize the filler range allowed and avoid substituting outside it.
Domain 3: Flow Position
Testing uses horizontal and vertical-upflow brazements. Filler flow behaves differently in each orientation, and gravity works with or against you.
- In vertical upflow, heat the joint so capillary action pulls filler upward through the engagement.
- In horizontal joints, watch for filler sagging toward the bottom of the joint.
Domain 4: Joint Design
Capillary brazing depends on tight, uniform clearance. Know the clearance concept, engagement depth, and how fit-up affects filler penetration. (See the clearance discrepancy noted later in this article.)
Domain 5: Brazing Flux, Fuel Gas, or Atmosphere
The specifications prohibit flux and require oil-free dry nitrogen at 5-10 CFH during brazing and until the joint is cool to the touch.
- Nitrogen purge prevents internal oxide (scale) formation that would contaminate a refrigeration system.
- Flow outside 5-10 CFH is a specification deviation.
- Continue the purge through cooling, not just while the torch is on.
Domain 6: Post Braze Heat Treatment
Post-braze heat treatment is prohibited. Know that this is a "none permitted" heading, so the joint must be acceptable as brazed.
Domain 7: Brazing Preparation, Assembly, Technique and Sectioning
This is where most failures originate: cleaning, fit-up, heating technique, and correct specimen identification for sectioning.
- Observe the eight-hour window between cleaning/assembly and brazing. This is a preparation constraint, not a written-exam duration or a practical-test timer.
- Label every specimen so lab results trace to the right joint.
Specification Rules That Quietly Fail Coupons
Candidates rarely fail because they cannot braze at all. They fail by drifting outside a written rule. Keep this checklist taped to your bench:
- No flux. The specification prohibits it. Reaching for flux out of habit on copper-to-copper joints is a specification violation.
- Nitrogen on, and kept on. Oil-free dry nitrogen at 5-10 CFH during brazing and until cool to the touch. Shutting the purge early invites oxidation.
- Filler within BCuP 2 through 7. Do not improvise with a filler outside the permitted range.
- No post-braze heat treatment. No re-heating to "improve" a joint after the fact.
- Eight-hour preparation window. Brazing must occur within eight hours of cleaning/assembly.
- Correct joint orientations. Both horizontal and vertical-upflow brazements are part of the assessment.
What a Pass Attempt Costs
Because passing is tied to physical submissions, the fee structure is part of the picture. Based on NITC's Certification Examination Price List (Exhibit 23, Rev 03-05-26) and the current detail pages, these figures apply:
| Item | Fee (USD) |
|---|---|
| Initial R78 test | $75 |
| Initial R218 test | $75 |
| Initial R418 test | $100 |
| R78 vertical-upflow requalification | $50 |
| Braze continuity (by letter) | $50 |
| Braze continuity (electronic) | $40 |
| Uncut coupon, below 3 inches (additional) | $22 |
| Uncut coupon, above 3 inches (additional) | $50 |
Material, fuel gas, nitrogen, and practice coupons are separate costs not covered by these fees, and we have no verified figure for them. For the broader budget picture, see HVACR Brazing certification cost, and for scheduling logistics see HVACR Brazing exam dates.
Keeping Your Qualification After You Pass
Passing is not the end of the process. Qualification continues indefinitely, but only with documented six-month continuity. Each extension runs six months from the latest qualifying brazement, and you must submit continuity before expiration.
Continuity Mechanics
The continuity process relies on three documents and a portal.
- Braze Continuity Letter Instruction and Sample, WI 7.2-29 Rev 10-31-24.
- Record of Continuity Brazer Qualification, Form 720-21 Rev 02-22-22.
- The public continuity portal, which identifies HVACR procedure BPS 18-R78 Rev. 1.
- Continuity must be attested by an authorized employer/contractor representative.
If continuity lapses, you must requalify. That means treating your six-month dates as a calendar obligation. Keep a log of qualifying brazements and the dates they were performed, and have your employer's authorized representative lined up well before the deadline. Whether the effort pays off is discussed in Is the HVACR Brazing certification worth it?
Source Discrepancies to Clarify Before Test Day
An honest account of the paperwork has to include the places where NITC's own documents disagree. These do not change the selected HVACR/ASME B31.5 scope, but they are worth knowing so you are not surprised, and they merit a clarifying question to the issuer.
- Joint clearance: The R78 specification prints a 0.001-0.007-inch joint clearance, while its qualification record prints 0.001-0.07 inch. The tighter figure is the realistic capillary range, but get written clarification from the issuer rather than assuming.
- NFPA 99 reference: The HVACR qualification-record sign-off text also cites NFPA 99, which is a healthcare facilities standard.
- Medical-gas procedure on the continuity form: The shared continuity form references medical-gas procedure 13-BPS148, even though the portal identifies HVACR procedure BPS 18-R78 Rev. 1.
Key Takeaway
When two official documents disagree, do not guess. Contact the issuer, get the answer in writing, and keep it with your qualification file. The dates and revision numbers on every form you use should match the current versions on NITC's site.
A Domain-Sequenced Preparation Plan
Generic study habits matter less here than sequencing the right skills in the right order. This plan front-loads the specification rules, then builds torch skill, then rehearses the full test. For a broader roadmap, see the HVACR Brazing study guide and the cheat sheet.
Rules and Materials (Domains 1, 2, 5, 6)
- Memorize: P-300 copper, BCuP 2-7 fillers, no flux, no post-braze heat treatment, nitrogen at 5-10 CFH until cool to the touch.
- Read the Braze Test Specification for your target test line by line.
Fit-Up and Orientation (Domains 3, 4)
- Practice cleaning and assembling joints with consistent clearance.
- Braze horizontal and vertical-upflow practice joints and cut them open.
Technique Under Purge (Domain 7)
- Braze with nitrogen flowing the entire time, including cooling.
- Section joints and inspect for voids and lack of penetration.
Full Rehearsal
- Run a complete mock test: prepare, assemble, braze both orientations, label specimens, fill records.
- Confirm the eight-hour window and your documentation are in order.
If you want to test your knowledge of the surrounding theory and terminology, the practice test site offers a place to drill concepts between bench sessions.
Frequently Asked Questions
No percentage passing score has been verified. The credential is a performance qualification, so passing means your brazements meet the acceptance criteria: satisfactory visual examination under QB-141.6 and laboratory sectioning under QB-181, with correct specimen identification and completed qualification records.
The sources we reviewed describe a manual torch-brazing performance qualification, not a timed written exam. The eight-hour figure in the specifications is a window between cleaning/assembly and brazing, not an exam duration or practical-test timer.
No. The seven headings are shared practical test-specification headings used as unweighted preparation topics. No official percentage weights were verified, and they do not establish an official domain count. Our domains guide explains how to prepare for each.
Qualification continues only with documented six-month continuity submitted before expiration. If it lapses, you must requalify. Continuity must be attested by an authorized employer or contractor representative.
See our difficulty guide for what makes the test challenging, and the salary guide and jobs page for how the qualification fits into hiring. For the original scoring-focused overview, you can also revisit this passing score page.
The bottom line: your "score" is the quality of the joints you produce and the accuracy of the paperwork you submit. Master the written rules, build torch discipline under a nitrogen purge, and verify every discrepancy with the issuer before you braze your test coupons.