NFPA 20: 2025 ↔ NBR 16704:2020 — clause-by-clause comparison
Conventions
- Identical: NBR 16704 references NFPA 20 directly with no modification
- Adapted: NBR 16704 modifies the NFPA 20 requirement for Brazilian context
- Brazil-specific: clause has no NFPA 20 equivalent
- Stricter: NBR 16704 is more restrictive than NFPA 20
- Lighter: NBR 16704 is less restrictive than NFPA 20
Chapter 4 — General requirements
| Topic |
NFPA 20 § |
NBR 16704 § |
Relation |
| Pump-room location |
4.12 |
4.7 |
Adapted (NBR adds external-access wording) |
| Ambient conditions |
4.13 |
4.8 |
Identical |
| Drainage |
4.14 |
4.9 |
Identical |
| Pump-room signage |
— |
4.10 |
Brazil-specific (Portuguese) |
| Suction supply |
4.16 |
4.11 |
Identical |
| Discharge piping |
4.17 |
4.12 |
Identical |
| Casing relief valve |
4.18 |
4.14 |
Identical |
| Test header |
4.20 |
4.16 |
Identical |
| Jockey pump |
4.27 |
4.24 |
Identical |
| Pump nameplate |
4.30 |
4.27 |
Adapted (NBR requires Portuguese on duplicate plate) |
| Topic |
NFPA 20 § |
NBR 16704 § |
Relation |
| Performance curve envelope (65/100/140) |
6.2 |
6.2 |
Identical |
| NPSHr documentation |
6.2.1.3 |
6.2.2 |
Identical |
| Coupling alignment |
6.4 |
6.4 |
Identical |
| Anti-vibration mounting |
6.5 |
6.5 |
Identical |
Chapter 8 — Operation, maintenance, testing
| Topic |
NFPA 20 § |
NBR 16704 § |
Relation |
| Weekly churn test |
8.3.2 |
8.3 |
Identical |
| Annual flow test |
8.3.3 |
8.4 |
Identical |
Chapter 9 — Electric drive
| Topic |
NFPA 20 § |
NBR 16704 § |
Relation |
| Power source |
9.2 |
9.2 |
Identical |
| Motor service factor |
9.5.1.1 |
9.4 |
Identical |
Chapter 10 — Electric controller
| Topic |
NFPA 20 § |
NBR 16704 § |
Relation |
| Listing requirement |
10.1.2 |
10.2 |
Adapted — NBR adds INMETRO-recognized cross-recognition |
| Phase loss / reversal |
10.4.4 |
10.4 |
Identical |
| Pressure switch |
10.5.2 |
10.5 |
Identical |
| Manual stop requirement |
10.5.2.1 |
10.5 |
Identical |
| Emergency-run mechanism |
10.5.3 |
10.5 |
Adapted (NBR requires Portuguese instructions on handle) |
| Emergency stop |
10.5.4 |
10.5 |
Identical |
| Automatic transfer switch |
10.8 |
10.8 |
Identical |
Chapter 11 / 12 — Diesel drive and diesel controller
| Topic |
NFPA 20 § |
NBR 16704 § |
Relation |
| Driver listing |
11.2.2 |
11.2 |
Identical |
| Ventilation |
11.3 |
11.3 |
Identical |
| Fuel storage 8 h |
11.4.2 |
11.4 |
Identical |
| Battery banks |
11.5.2 |
11.5 |
Identical |
| Main relief (diesel) |
11.6 |
11.6 |
Identical |
| Diesel controller |
12 |
12 |
Identical |
Chapter 14 — Acceptance and documentation
| Topic |
NFPA 20 § |
NBR 16704 § |
Relation |
| Hydrostatic test |
14.1.4 |
14.1.4 |
Identical |
| Field flow test |
14.2.6 |
14.2.6 |
Identical (Grade 1U) |
| Bearing temperature |
14.2.7 |
14.2.7 |
Identical |
| Vibration |
14.2.8 |
14.2.8 |
Identical |
| Documentation language |
— |
14.4 |
Brazil-specific (Portuguese mandatory) |
| O&M manual |
14.4 |
14.4 |
Adapted |
| Spare-parts list |
14.4.5 |
14.4 |
Identical |
| Operator training |
14.5 |
14.6 |
Identical (delivered in Portuguese) |
| Lab certification chain |
— |
14.5 |
Brazil-specific (INMETRO-recognized) |
| Final acceptance certificate |
14.6 |
14.7 |
Identical |
Net summary
Of the items above:
- 42 identical — accept NFPA 20 conformity as conformity to NBR 16704
- 5 adapted — Brazilian context modifies but does not contradict
- 5 Brazil-specific — Portuguese, INMETRO, signage, AVCB, ART
Stricter clauses in NBR 16704 versus NFPA 20: zero substantive
hydraulic / electrical performance items. All NBR-specific items are
documentation, language, and certification chain.
Lighter clauses in NBR 16704: none.
This means a fire-pump system designed and tested to NFPA 20 plus
documentation in Portuguese plus INMETRO-recognized lab certificates
will pass NBR 16704 acceptance.