- Why There Is No Published Pass Rate
- What Is Actually Being Assessed
- The Two Acceptance Gates: Visual and Sectioning
- Where Failures Realistically Come From
- R78 vs. R218 vs. R418 at a Glance
- Fees, Retests and Continuity
- Source Discrepancies to Clarify Before You Test
- A Domain-by-Domain Preparation Sequence
- Frequently Asked Questions
- The issuer, NITC, publishes no pass-rate figure in the sources checked, so any specific percentage you see online is unverified.
- Success depends on two gates: satisfactory visual examination under QB-141.6 and laboratory sectioning under QB-181.
- Initial R78 and R218 tests are USD 75 each, R418 is USD 100, and R78 vertical-upflow requalification is USD 50.
- Specifications prohibit flux and require oil-free dry nitrogen at 5-10 CFH until the joint is cool to the touch.
Why There Is No Published Pass Rate
If you searched for the HVACR Brazing pass rate hoping for a tidy percentage, here is the honest answer: the public NITC materials for HVACR Brazing Processes do not publish one. The sources reviewed for this article, including the three Braze Test Specification / Brazer Qualification Record pairs, the issuer brochure, the price list and the detail pages, contain no pass-rate statistic, no cohort data and no first-attempt versus retest breakdown. Any number you see quoted elsewhere should be treated as unverified, and there is a real risk it belongs to a different credential that happens to share similar language.
That absence is itself informative. HVACR Brazing Processes is not a multiple-choice, scored-percentage exam. It is a manual torch-brazing performance qualification. A candidate brazes test joints, the specimens are examined and sectioned, and the result is a documented qualification record rather than a scaled score. In that kind of assessment, the meaningful question is not "what percent pass?" but "what causes a coupon to be accepted or rejected?" The rest of this article answers that question from the primary documents.
If you are still orienting yourself, start with What Is HVACR Brazing Certification? and then return here for the data-driven view of difficulty and outcomes.
What Is Actually Being Assessed
The qualification family consists of three tests, designated R78, R218 and R418. Each is documented on a two-page Braze Test Specification paired with a Brazer Qualification Record. All three forms are Rev 04-09-25, reference BPS 18-R78 Revision 1, and cite ASME Section IX and ASME B31.5 in their qualification-record headings. The assessment is manual torch brazing, performed in horizontal and vertical-upflow positions.
The seven domain headings on the test specifications are practical preparation topics, not weighted exam sections, and no official percentage weights were verified. They are:
- Base Metal
- Brazing Filler Metal
- Flow Position
- Joint Design
- Brazing Flux, Fuel Gas, or Atmosphere
- Post Braze Heat Treatment
- Brazing Preparation, Assembly, Technique and Sectioning
For a full walkthrough of how these headings map to hands-on work, see HVACR Brazing Exam Domains 2026: Complete Guide to All 7 Content Areas.
What the specifications fix in place
Much of what could vary between candidates is locked down by the documents, which narrows the room for error:
- Base metal: P-300 copper.
- Filler metal: BCuP 2 through 7 permitted.
- Flux: prohibited.
- Post-braze heat treatment: prohibited.
- Atmosphere: oil-free dry nitrogen at 5-10 CFH during brazing and until the joint is cool to the touch.
The Two Acceptance Gates: Visual and Sectioning
Because no pass rate is published, the most useful "data" is the structure of the acceptance criteria. A brazement must clear two gates in sequence.
Gate 1: Visual examination under QB-141.6
The first screen is satisfactory visual examination. This is where surface-level problems surface: incomplete filler flow on the exterior, evidence of overheating, poor fillet formation or visible discontinuities. Visual acceptance does not guarantee the inside of the joint is sound, which is why the second gate exists.
Gate 2: Laboratory sectioning under QB-181
The second gate is sectioning. The specimens are cut and examined in the test laboratory. This is where hidden defects show up, such as lack of filler penetration, voids or inadequate joint fill. Candidates must submit correctly identified sectioned specimens along with completed qualification records, so even paperwork and specimen identification are part of getting a clean result.
Key Takeaway
Prepare for the cut, not just the look. A joint that appears fine externally can still fail at QB-181. Practice on scrap by sectioning your own practice joints so you can see what the inside of your work actually looks like.
Where Failures Realistically Come From
Without published failure statistics, we should not invent a ranked list of "top failure causes" with percentages. What we can do is reason from the specification requirements, since each requirement is a point where a brazement can be rejected. This is analysis of the documented rules, not a claim about observed frequencies.
Nitrogen purging and atmosphere control
The specifications require oil-free dry nitrogen at 5-10 CFH during brazing and until cool to the touch. Because flux is prohibited, the nitrogen purge is what keeps the interior of the tube clean. Flow outside the specified range, or shutting off the purge too early, creates exactly the kind of internal condition that sectioning is designed to reveal.
- Know the 5-10 CFH range cold.
- Keep nitrogen flowing until the joint is cool to the touch.
- Use oil-free dry nitrogen, not an unspecified source.
Filler metal and joint design
BCuP 2 through 7 are permitted, and joint clearance governs capillary flow. Clearance that is too tight or too loose affects whether filler reaches the full joint depth. Note the printed clearance discrepancy discussed below, since it matters directly to joint design preparation.
- Match filler selection to what the specification permits.
- Control fit-up so capillary action can fill the joint.
Flow position
Horizontal and vertical-upflow brazements are both assessed. Gravity and heat management differ between them, and a candidate comfortable in one position can struggle in the other. Practice both rather than defaulting to whichever feels easier.
Preparation and the eight-hour window
The eight-hour limit between cleaning/assembly and brazing is a preparation constraint, not a written-exam duration or a practical-test timer. It means you cannot clean and assemble parts, set them aside, and braze them the next day. Plan your workflow so assembly and brazing happen inside that window.
For a candid look at how these demands translate into perceived difficulty, read How Hard Is the HVACR Brazing Exam? Complete Difficulty Guide 2026.
R78 vs. R218 vs. R418 at a Glance
The three tests differ mainly by tube size and the range of sizes they qualify. Larger tube generally demands more heat control and a longer working time, which is a reasonable thing to weigh when choosing where to start, though no source gives comparative success data.
| Test | Form | Test tube OD | Type ACR qualification range (OD) | Initial test fee |
|---|---|---|---|---|
| R78 | 720-116 | 7/8 inch | 1/8 through 1-1/8 inches | USD 75 |
| R218 | 720-117 | 2-1/8 inches (Type ACR or 2-inch Type L permitted) | 1-1/8 through 3-1/8 inches | USD 75 |
| R418 | 720-118 | 4-1/8 inches | 2-1/8 through 4-1/8 inches | USD 100 |
Choosing the right test depends on the line sizes you actually braze on the job. Our guide to HVACR Brazing Requirements 2026 helps you match your work to the right qualification.
Fees, Retests and Continuity
Since a pass rate is unavailable, cost per attempt is the next-best way to understand risk. The NITC Certification Examination Price List (Exhibit 23 Rev 03-05-26) lists the following:
- Initial R78 and R218 tests: USD 75 each.
- Initial R418 test: USD 100.
- R78 vertical-upflow requalification: USD 50.
- Braze continuity: USD 50 by letter or USD 40 electronically.
- Each uncut coupon: an additional USD 22 below 3 inches or USD 50 above 3 inches.
Current detail pages corroborate the initial fees and reference a requalification test using one vertical-upflow R78 joint. For the complete financial picture, including how the coupon charges stack, see HVACR Brazing Certification Cost 2026: Complete Pricing Breakdown.
How continuity affects the "pass" that matters
Passing once is not the end of the story. Qualification continues indefinitely only with documented six-month continuity. Continuity must be submitted before expiration, each extension runs six months from the latest qualifying brazement, and it must be attested by an authorized employer or contractor representative. The continuity portal identifies HVACR procedure BPS 18-R78 Rev. 1. A lapse requires requalification.
Source Discrepancies to Clarify Before You Test
An honest read of the primary documents turns up inconsistencies. These do not change the selected HVACR/ASME B31.5 scope, but they are worth raising with the issuer before you test, because any ambiguity in your preparation can become a reason for a rejected coupon.
- Joint clearance: the R78 specification prints a 0.001-0.007-inch clearance, while its qualification record prints 0.001-0.07 inch. These differ by an order of magnitude, so confirm which governs.
- NFPA 99 reference: the HVACR qualification-record sign-off text also cites NFPA 99.
- Medical-gas procedure reference: the shared continuity form references medical-gas procedure 13-BPS148.
The public sample BPS 18-R78 Revision 1 (Exhibit 21 Rev 01-02-24) is supporting reference material. It carries a performance-qualification-only watermark, and adoption responsibility rests with the manufacturer or contractor. Use it to understand the procedure, not as a substitute for your employer's adopted procedure.
A Domain-by-Domain Preparation Sequence
Generic study tactics matter far less here than hands-on repetition, so this sequence is organized by the seven specification headings and by what is easiest to verify yourself. Adjust the pacing to your schedule and the size of tube you are targeting.
Read the specifications and lock in the fixed rules
- Read your Braze Test Specification and Brazer Qualification Record end to end.
- Memorize the fixed items: P-300 copper, BCuP 2 through 7, no flux, no post-braze heat treatment, nitrogen at 5-10 CFH.
Joint design and preparation
- Practice fit-up and consistent clearance, resolving the printed clearance discrepancy with the issuer first.
- Rehearse the cleaning/assembly-to-brazing workflow inside the eight-hour window.
Flow position and technique
- Braze horizontal and vertical-upflow practice joints in alternating sessions.
- Maintain nitrogen purge through cooling on every practice joint.
Sectioning and record-keeping
- Section your own practice joints and inspect for penetration and voids.
- Practice correctly identifying specimens and completing the qualification record.
For a broader plan that pairs hands-on work with knowledge review, see HVACR Brazing Study Guide 2026: How to Pass on Your First Attempt, and keep the HVACR Brazing Cheat Sheet 2026 nearby for quick fact checks. If you want to reinforce the terminology and code references that surround the hands-on work, our HVACR Brazing practice test is a useful companion to your bench time.
Frequently Asked Questions
No pass rate is published in the NITC sources reviewed for HVACR Brazing Processes. Because the assessment is a performance qualification judged by visual examination and sectioning, outcomes are tied to acceptance criteria rather than a reported percentage. Treat any specific figure you find online as unverified.
The brazement must show satisfactory visual examination under QB-141.6 and satisfactory laboratory sectioning under QB-181. Candidates must also submit correctly identified sectioned specimens and completed qualification records.
No. The eight-hour window between cleaning/assembly and brazing is a preparation constraint. It is not a written-exam duration or a practical-test timer, so plan your workflow to braze within that window after assembly.
Qualification continues indefinitely only with documented six-month continuity, submitted before expiration and attested by an authorized employer or contractor representative. A lapse requires requalification, so track your six-month dates carefully.
Compare earnings and return on investment in HVACR Brazing Salary Guide 2026 and Is the HVACR Brazing Certification Worth It?, and check scheduling details in HVACR Brazing Exam Dates 2026.