2026-09-21 · Équipe éditoriale KeXinMaterials
ISO 80079-36 + ISO 80079-37 Non-Electrical Equipment Hazardous Area Protective Case B2B Guide
ISO 80079-36 + ISO 80079-37 are the global standards for non-electrical equipment in explosive atmospheres. EN 17579 harmonizes with EU ATEX. Below is the 2026 B2B procurement guide covering mechanical equipment Ex h, ignition hazard assessment, non-electrical ignition sources, and protective case correlation.
ISO 80079-36 + ISO 80079-37 Equipements Ex Non-Electriques
ISO 80079-36 (non-electrical equipment + protective systems + safety devices) + ISO 80079-37 (non-electrical equipment - protective systems + safety devices - construction + testing) define requirements for non-electrical equipment in explosive atmospheres. Harmonized as EN 80079-36/37 in EU.
ISO 80079-36 scope: Non-electrical equipment + protective systems + safety devices intended for use in explosive atmospheres. Type of protection "h" (Ex h). Applies to mechanical + hydraulic + pneumatic equipment, valves, pumps, gearboxes, fasteners, mechanical seals, etc.
ISO 80079-36 ignition hazards: Mechanical equipment can ignite explosive atmospheres via: (1) Hot surfaces (above auto-ignition temp). (2) Mechanically generated sparks (impact / friction between metals). (3) Static electricity. (4) Electromagnetic radiation (RF). (5) Optical radiation (UV / IR / laser). (6) Chemical reactions (corrosion + heat). (7) Adiabatic compression + shock waves.
Hot surface ignition: Mechanical friction (e.g., bearing failure, brake wear) generates heat. Surface temperature must remain below auto-ignition temperature of gas / dust. Limits per ISO 80079-36 Table 1 + ISO 80079-37.
Mechanical spark ignition: Impact + friction between certain material pairs (steel + steel, steel + aluminum) can generate hot sparks capable of igniting explosive atmosphere. Use non-sparking materials (brass, bronze, 316L SS). Material pairing limits per ISO 80079-37.
Static electricity ignition: Charge accumulation on non-conductive materials (plastics, rubber) can discharge sparks. Materials must have surface resistivity < 1 Gohm or use conductive + dissipative materials. Grounding strap.
Type of protection "h" (Ex h): Per ISO 80079-36 + EN 17579. Default protection type for non-electrical equipment. Specific protection techniques per ISO 80079-37: liquid immersion (Ex hk), restricted breathing (Ex hr), constructional safety (Ex hc), control of ignition sources (Ex hb), enclosure (Ex hd), etc.
Ex h constructional safety (Ex hc, ISO 80079-37): Design + material selection to prevent ignition. Materials, surface finish, mechanical clearances + tolerances, anti-spark components.
Ex h liquid immersion (Ex hk, ISO 80079-37): Liquid-filled enclosure preventing contact with explosive atmosphere. Used for transformers, capacitors, switches with liquid dielectric.
Ex h control of ignition sources (Ex hb, ISO 80079-37): Monitoring + control system to detect + prevent ignition. Sensors detect temperature / vibration / spark + initiate protective action (shutdown + inerting + ventilation).
Ex h enclosure (Ex hd, ISO 80079-37): Enclosure preventing contact of internal components with explosive atmosphere + limiting surface temperature. Used for mechanical equipment with hot internals (e.g., motors with hot surfaces).
Ex h restricted breathing (Ex hr, ISO 80079-37): Tight enclosure limiting gas ingress below flammable limit. Periodic pressure check required.
ISO 80079-36 + protective case: Cases for non-electrical equipment (e.g., valves, pumps, gearboxes, mechanical components) in hazardous areas. Case provides mechanical protection + environmental protection + ignition source prevention.
Ignition hazard assessment per ISO 80079-36: (1) Identify ignition sources. (2) Determine conditions for ignition. (3) Determine protective measures. (4) Document in ignition hazard assessment report.
B2B relevance: For B2B manufacturers supplying non-electrical equipment to hazardous area customers, ISO 80079-36/37 + EN 17579 certification required. Most customers accept IECEx certification for global market.
B2B recommendation: For 2026 B2B orders targeting non-electrical hazardous area customers, target ISO 80079-36/37 + EN 17579-compliant protective case: Ex h protection, anti-spark + non-sparking components (brass / 316L SS), anti-static materials, IP54+ enclosure, FOB Shenzhen/Ningbo/EXW delivery 30-45 days.
EN 17579 + UE ATEX Equipements Non-Electriques
EN 17579 (CEN) is the European harmonized standard for non-electrical equipment in explosive atmospheres. Adopted as EN ISO 80079-36/37.
EN 17579 scope: Non-electrical equipment + protective systems + safety devices for explosive atmospheres. EN ISO 80079-36 + EN ISO 80079-37 harmonized for ATEX Directive 2014/34/EU.
EN 17579 + ATEX: EN 17579 harmonized standards provide presumption of conformity with ATEX 2014/34/EU Essential Health + Safety Requirements (Annex II). Manufacturer can self-declare compliance for non-electrical equipment in Zone 2 + Zone 22 (Category 3). Zone 1 + Zone 21 (Category 2) requires Notified Body involvement.
EN 17579 conformity assessment: (1) Module A (Internal Production Control, Cat 3, Zone 2/22). (2) Module B (EU Type Examination, Cat 2, Zone 1/21). (3) Module C (Conformity to Type, Cat 2). (4) Module D (Production Quality Assurance, Cat 2). (5) Module E (Product Quality Assurance, Cat 2). (6) Module F (Product Verification, Cat 1/2). (7) Module G (Unit Verification, Cat 1). (8) Module H (Full Quality Assurance, Cat 1).
EN 17579 documentation: (1) Risk assessment per EN ISO 80079-36 ignition hazard assessment. (2) Technical documentation per 2014/34/EU Annex VIII. (3) EU Declaration of Conformity per Annex IV (Cat 2) or Annex V (Cat 3). (4) User manual + installation + maintenance instructions.
EN 17579 marking: CE + Ex II 2G IIC T6 Xh Gb (or similar). Components marked with "U" suffix.
EN 17579 non-sparking materials: For mechanical sparks, use materials with low friction coefficient + high thermal conductivity + low propensity for spark generation. Approved pairs: stainless steel + stainless steel, brass + steel, bronze + steel. Disallowed: steel + steel, aluminum + steel (in IIC groups), magnesium + steel.
EN 17579 surface temperature limits: Max surface temperature < auto-ignition temperature of gas / dust. For T4 (135 C), gas auto-ignition > 135 C. For T6 (85 C), gas auto-ignition > 85 C (e.g., hydrogen, acetylene, carbon disulfide).
EN 17579 + protective case: Case for non-electrical equipment must not introduce ignition sources. Anti-static materials (surface resistivity < 1 Gohm). Non-sparking latches + hinges. Case surface temperature < gas auto-ignition.
EN 17579 customer audit: ATEX Notified Body performs production audit per Module D. ISO/IEC 80079-34 (formerly EN 13980) provides guidance on production QA.
EN 17579 + IECEx: EN 17579 harmonized with IEC 60079 + ISO 80079 series. IECEx certification accepted globally.
B2B relevance: For B2B manufacturers exporting to EU, EN 17579 + ATEX 2014/34/EU compliance is mandatory for non-electrical equipment in hazardous areas. Self-declaration for Zone 2/22 + Notified Body for Zone 1/21.
B2B recommendation: For 2026 B2B orders targeting EU non-electrical hazardous area customers, target EN 17579 + ISO 80079-36/37 compliant protective case: ATEX certified (Cat 2/3) + Ex h marking + IECEx CoC + QAR, anti-spark materials + anti-static surface, FOB Shenzhen/Ningbo/EXW delivery 30-45 days.
Liste de verification B2B zone dangereuse
Comprehensive B2B procurement guide for hazardous area protective cases. Covers certification, materials, mechanical design, customer documentation.
Certification: ATEX (EU) + IECEx (global) + NEC 500/505 (US) + CSA (Canada) + CCC (China). Multi-region certifications streamline global market entry.
Protection type: Ex d (flameproof, Zone 1) + Ex e (increased safety, Zone 1/2) + Ex t (dust, Zone 21/22) + Ex h (non-electrical, ISO 80079) + Ex n (non-incendive, Zone 2) + Ex i (intrinsic safety, Zone 0).
Equipment group: Group I (mining, methane), Group II (surface, gas), Group III (surface, dust). Sub-groups: IIA/IIB/IIC (gas), IIIA/IIIB/IIIC (dust).
EPL (Equipment Protection Level): Ga / Gb / Gc (gas) + Da / Db / Dc (dust) + Ma / Mb (mining). Higher EPL = lower zone allowed.
Temperature class: T1 (450 C), T2 (300 C), T3 (200 C), T4 (135 C), T5 (100 C), T6 (85 C). Higher = more restrictive. Most common: T4 + T6.
Material selection: Anti-static PP / ABS with carbon black filler. Conductive PP / ABS / polycarbonate. Stainless steel 316L hinges + latches (anti-corrosion + non-sparking). Brass / bronze hardware (avoid aluminum + magnesium).
Anti-spark features: Stainless steel 316L latches + hinges (low spark risk). Brass / bronze hardware. Avoid steel + steel impact / friction in IIC groups. Aluminum + steel impact prohibited in IIC groups.
Anti-static features: Surface resistivity < 1 Gohm (per IEC 60079-0 clause 7.4). Conductive coating on metallic hardware. Grounding strap + bonding points.
Cable + conduit entries: ATEX certified cable glands (Hawke, CMP, Peppers). Conduit entry (1/2 NPT or M20). Barrier glands for Zone 0/1 + intrinsically safe.
Environmental: IP54 minimum (per IEC 60079-0). IP65/IP67 for harsher environments. Operating temperature -20 to +40 C (standard), -40 to +70 C (extended).
Mechanical: Drop test 1.5m. Vibration test per IEC 60068-2-6. Impact test per IEC 60079-0 clause 26.4. Stackable design for transport.
Documentation: EC Type Declaration per 2014/34/EU Annex III. IECEx CoC + ExTR + QAR. UL/cUL certificate. CCC / KCS as required. ISO 9001 + ISO/IEC 80079-34.
Quality assurance: Production per ISO 9001. Ex production QA per ISO/IEC 80079-34. Annual Notified Body audit for Cat 2. Annual QAR surveillance for IECEx.
Lifecycle: ATEX certificate 5-year renewal. IECEx CoC 3-year renewal with annual QAR. Test report per batch for OEM production.
B2B recommendation: For 2026 B2B orders targeting global hazardous area customers, target multi-region + multi-protection-type certified protective case: ATEX + IECEx + UL/cUL + CCC, Ex e + Ex t + Ex h, gas group IIC + dust group IIIC + temperature class T6, anti-spark + anti-static, IP67, FOB Shenzhen/Ningbo/EXW delivery 30-45 days.
Points clés
- ISO 80079-36 + ISO 80079-37 + EN 17579 = global standards for non-electrical equipment in explosive atmospheres.
- Type of protection Ex h (default for non-electrical): Ex hc, Ex hk, Ex hb, Ex hr, Ex hd.
- Ignition hazards: hot surface, mechanical sparks, static electricity, electromagnetic radiation, optical radiation, chemical reaction, adiabatic compression.
- Anti-spark materials: 316L SS + brass/bronze (avoid aluminum + steel in IIC groups).
- B2B procurement: ISO 80079-36/37 + ATEX + IECEx compliant, anti-spark + anti-static, IP54+, FOB Shenzhen/Ningbo/EXW.
FAQ
q
a
q
a
q
a
q
a
q
a
q
a