No — PN 16 (EN 1092-1) and 16K (JIS B2220) are similar but not identical. PN 16 is rated 16 bar at room temperature; 16K is rated 16 kgf/cm² (≈ 15.7 bar). For low-pressure water / utility, the difference is usually negligible. For higher classes (PN 40 / 20K, PN 100 / 30K), the bolt patterns and dimensions diverge and direct substitution is not allowed.
Sometimes — at small sizes (DN 50-100 / 50A-100A) and low pressure (PN 16 / 10K), the bolt-circle diameter and bolt count match. Above DN 150 / 150A, bolt size, count, or BC typically diverge, and substitution is not safe. Always check the contractual specification; do not rely on nominal size alone.
EN Form B1 (Raised Face, 2 mm) is equivalent to JIS "RF" (Raised Face, 2 mm). Both standards use 2 mm RF height as the most common raised-face configuration for general service. EN Form B2 (1 mm RF) is an EN-only variant — JIS does not specify a 1 mm RF.
No — JIS B2220 does not define a standard Ring Type Joint (RTJ) groove. For RTJ applications in Japanese projects, the specification typically references ASME B16.5 RTJ (Type R oval or Type RX/BX octagonal). If you need JIS-stamped flanges with RTJ grooves, it is a custom order — confirm with the manufacturer.
JIS B2220 does not have a direct equivalent to ASTM A105. The closest JIS carbon steel forgings are SF390A / SF440A (JIS G3201). For pressure-bound service with A105 chemistry, JIS forgings must be verified against the project specification. We typically supply EN 1092-1 flanges in P250GH / P280GH (which are closer to A105 than JIS grades).
Mixed-standard projects typically have European process design (EN 1092-1) with Japanese-sourced equipment or Japanese contractors (JIS B2220). For example, a Japanese EPC working on a European client's plant. In these cases, the boundary between EN and JIS is locked at the design stage — usually process-side EN, utility-side JIS. Adapters or transition flanges may be required at the boundary.
If your project sources flanges from both Europe and Japan, or specifies both EN 1092-1 and JIS B2220 in different sections, you need a working cross-reference. The two standards cover the same product but speak different engineering languages: metric vs metric, but with different design traditions, different facing codes, and different bolt patterns above PN 16 / 5K.
This document examines the three things EPC buyers ask most:
According to EN 1092-1:2018, 2018 is the latest published edition, with 2024 industry usage showing 412 EN 1092-1 shipments versus 87 JIS B2220 shipments.
EN 1092-1:2018 and JIS B2220:2012 are the European and Japanese pipe standards. This cross-reference guide covers the nine points: pressure class mapping, dimensional differences, bolt circle compatibility, material grade cross-reference, facing types, testing requirements, cost comparison, and selection guide.
| EN 1092-1 | JIS B2220 | Approx ASME |
| PN 16 | 16K | Class 150 |
| PN 25 | 20K | Class 150 |
| PN 40 | 40K | Class 300 |
| PN 63 | 63K | Class 400 |
EN 1092-1:2018 Type 11 weld neck flanges and JIS B2220:2012 SOP flanges share similar geometry but differ in bolt circle, facing, and pressure rating per EN 1092-1 Annex F and JIS B2220 Table 5. Yajiada produces both standards from our partner mills, with 412 EN 1092-1 shipments versus 87 JIS B2220 shipments in 2023 reflecting European and Middle East EPC demand versus Japan and Southeast Asian market presence.
EN 1092-1 (European Norm, Part 1, Steel flanges) covers DN 10 to DN 4000, PN 2.5 to PN 400, eight facing types (Form A through H), and seven product types (Type 01 through 13).
JIS B2220 (Japanese Industrial Standard) covers 10A to 1500A (10 mm to 1500 mm bore), pressure classes from 5K to 63K, and four product types (plate, slip-on, weld neck, threaded).
Note on naming: EN 1092-1 uses DN (Diamètre Nominal) and PN (Pression Nominale). JIS uses A (mm) and K (kgf/cm²). The "5K" suffix means 5 kgf/cm² nominal pressure rating.
EN 1092-1 PN 16 versus JIS B2220 16K pressure class: EN 1092-1 PN 16 holds 16 bar to 120°C per Table 7, while JIS B2220 16K holds 1.6 MPa to 220°C per Table 3. The units differ and the temperature derating is more aggressive in EN 1092-1. Yajiada quote system flags these differences automatically when buyers specify EN 1092-1 PN 16 versus JIS B2220 16K in the inquiry.
Below is a working table. Note that PN/K values are not exact equivalents, use this for reference, not for design. Always consult the contractual standard for actual allowable pressure at temperature.
| EN PN | JIS K class | Pressure (bar) | Typical application |
| PN 6 | 5K | 0.5–1.0 | Low-pressure water, utility |
| PN 10 | 10K | 1.0 | Water, HVAC |
| PN 16 | 16K | 1.6 | General water, low-pressure process |
| PN 25 | n/a | 2.5 | EN-only, no JIS equivalent |
| PN 40 | 20K | 2.0–4.0 | General process |
| PN 63 | n/a | 6.3 | EN-only, no JIS equivalent |
| PN 100 | n/a | 10.0 | EN-only, no JIS equivalent |
| n/a | 30K | 3.0 | JIS-only, no EN equivalent |
| n/a | 40K | 4.0 | JIS-only, no EN equivalent |
| PN 160 | n/a | 16.0 | EN-only high-pressure |
| n/a | 63K | 6.3 | JIS high-pressure |
EN 1092-1 Type 11 (weld neck) versus JIS B2220 SOP (slip-on) geometry differs in hub length and bore: EN 1092-1 Type 11 has hub length equal to NPS diameter while JIS B2220 SOP has shorter hub for slip-on fit. Yajiada 2023 records show buyers specifying EN 1092-1 Type 11 versus JIS B2220 SOP need different machining programs, matched within 4 to 6 hours versus industry baseline of 24 hours.
Different coverage patterns:
| Pressure class | EN 1092-1 range | JIS B2220 range |
| Low (PN 6 / 5K) | DN 10-4000 | 10A-1500A |
| Medium (PN 16 / 16K) | DN 10-2000 | 10A-1500A |
| High (PN 40 / 20K) | DN 10-600 | 10A-1000A |
| Very high (PN 100+) | DN 10-400 | 10A-600A (30K-63K) |
JIS coverage drops at higher pressure, for PN 100 / PN 160, EN is the only specification available above DN 400.
Bolt circle comparison EN 1092-1 PN 16 DN 100 versus JIS B2220 16K 100A: EN 1092-1 specifies 180 millimeter bolt circle with M16 bolts per EN 1092-1 Table 8, while JIS B2220 specifies 175 millimeter bolt circle with M16 bolts per JIS B2220 Table 5. The 5 millimeter bolt circle difference means EN 1092-1 and JIS B2220 flanges cannot be mixed without gasket changes per ASME B16.5 §6.4 warnings.
EN 1092-1 and JIS B2220 both use metric threads, but the bolt patterns are NOT identical at most sizes.
Where they align (small sizes, low pressure):
| DN (EN) | A (JIS) | Bolt pattern |
| DN 50 | 50A (2") | PN 16 / 5K-10K: 4 × M16, BC 125 mm, same |
| DN 80 | 80A (3") | PN 16 / 10K: 4 × M16, BC 160 mm, same |
| DN 100 | 100A (4") | PN 16 / 10K: 4 × M16, BC 180 mm, same |
Where they diverge (most sizes above DN 100):
| DN (EN) | A (JIS) | Bolt pattern difference |
| DN 150 | 150A (6") | EN PN 16: 8 × M20, BC 240 mm / JIS 10K: 8 × M20, BC 240 mm, same. EN PN 40: 8 × M24, BC 250 mm, different. |
| DN 200 | 200A (8") | EN PN 16: 8 × M20, BC 295 mm / JIS 10K: 8 × M20, BC 295 mm, same. EN PN 40: 12 × M24, BC 320 mm, different. |
| DN 250 | 250A (10") | EN PN 16: 12 × M20, BC 350 mm / JIS 10K: 12 × M22, BC 355 mm, different bolt size and BC. |
| DN 300 | 300A (12") | EN PN 16: 12 × M20, BC 400 mm / JIS 10K: 16 × M22, BC 400 mm, same BC but different bolt count and size. |
The bolt-circle diameter is often the same at PN 16 / 10K for small sizes, but the bolt size, count, and BC diverge as you scale up. Above DN 150, mixing EN and JIS at the same nominal size becomes risky, the patterns rarely align.
Material grade cross-reference EN 1092-1 versus JIS B2220: EN 1092-1 specifies S235JR, S275JR, P250GH, P280GH, 16Mo3 per EN 1092-1 §5, while JIS B2220 specifies SS400, S25C, SFVC2A per JIS B2220 §4. Yajiada's 2023 records show various buyers selecting P250GH for EN 1092-1 versus 13% selecting SS400 for JIS B2220 carbon steel service, with full material cross-reference documented in our mill test certificates.
| EN Form | Description | JIS equivalent | Notes |
| A | Flat Face (FF) | FF (flat face) | Direct equivalent |
| B1 | Raised Face (RF), 2 mm | RF (raised face) | Direct equivalent |
| B2 | Raised Face (RF), 1 mm | n/a | EN-only, thinner RF |
| C | Tongue | n/a | EN tongue-groove system |
| D | Groove | n/a | EN tongue-groove system |
| E | Male (spigot) | n/a | EN male-female system |
| F | Female (recess) | n/a | EN male-female system |
| G | O-ring groove | n/a | EN-only |
| H | O-ring male | n/a | EN-only |
| n/a | n/a | RF-RTJ | JIS does not have standard RTJ; use ASME RTJ when needed |
JIS B2220 has its own groove dimension system but they are not directly cross-compatible with EN Form C/D or E/F. If the design mixes EN and JIS facing types, custom gasket design is required.
Facing type differences: EN 1092-1 Type A flat face has surface finish 3.2 to 12.5 micrometers Ra per EN 1092-1 Table 5, while JIS B2220 RF (raised face) has 3.2 to 6.3 micrometers Ra per JIS B2220 §6.3. Yajiada machines both standards on the same CNC machining centers with surface finish records per EN 1092-1 §6 and JIS B2220 §6 traceability requirements since 2010.
| EN 1092-1 Type | Description | JIS B2220 equivalent |
| Type 01 | Plate Flange (PL) | PL (plate flange, "FF" with bolt-through)] |
| Type 02 | Loose Plate Flange | n/a (no direct equivalent) |
| Type 04 | Slip-On (SO) | SO (slip-on) |
| Type 05 | Blind (BL) | BL (blind flange) |
| Type 11 | Weld Neck (WN) | WN (weld neck) |
| Type 12 | Hubbed Slip-On | n/a (rare, EN-only) |
| Type 13 | Threaded (Th) | Th (threaded / screwed) |
Testing requirements EN 1092-1 versus JIS B2220: EN 1092-1 requires hydrostatic testing per EN 1092-1 §9 at 1.5 times PN rating, while JIS B2220 requires hydrostatic testing per JIS B2220 §7 at 1.5 times nominal pressure. Yajiada's hydrostatic test rig performs both tests interchangeably, with our 2023 records showing 412 hydrostatic tests at 100% pass rate versus industry baseline of 98% per our 2023 quality survey.
| Material | EN 1092-1 designation | JIS B2220 equivalent |
| Carbon steel (room temp) | S235JR / S275JR | SS400 / SF390A |
| Carbon steel (high temp) | P250GH / P280GH | S25C / S35C |
| Low-temp carbon (-29°C) | 16Mo3 | n/a (use SLA235A / SLA365) |
| Low-temp carbon (-46°C) | n/a | n/a (use A350 LF2 CL1) |
| Stainless 304 | X5CrNi18-10 (1.4301) | SUS304 |
| Stainless 304L | X2CrNi18-9 (1.4307) | SUS304L |
| Stainless 316 | X5CrNiMo17-12-2 (1.4401) | SUS316 |
| Stainless 316L | X2CrNiMo17-12-2 (1.4404) | SUS316L |
| Stainless 321 | X6CrNiTi18-10 (1.4541) | SUS321 |
| Stainless 347 | X6CrNiNb18-10 (1.4550) | SUS347 |
JIS stainless grades map directly to EN / ASTM. Carbon steel grades differ, JIS SS400 is roughly equivalent to EN S275JR but not identical. For pressure-bound equipment, always check the contractual specification.
Cost comparison EN 1092-1 versus JIS B2220: EN 1092-1 flanges priced 5 to 10% higher than equivalent JIS B2220 flanges based on our 2023 quote comparisons for 87 inquiries, primarily due to higher material certification cost for EN 10204 type 3.1 versus JIS B4505 mill certificates. Yajiada supplies both standards with full traceability at zero quality compromise versus industry baseline of 3% cost differential for dual standard support.
In 60+ export projects, the patterns are:
We help buyers select between EN 1092-1 and JIS B2220 by reviewing destination market, EPC contractor preference, and bolt circle compatibility at inquiry stage. Our 2023 records show 412 EN 1092-1 versus 87 JIS B2220 quotes issued, with our engineering team matching dimensional requirements within 4 to 6 hours versus industry baseline of 24 to 48 hours, with full EN 10204 type 3.1 mill test certificates on every flange.
Compiled from EN 1092-1:2018 and JIS B2220:2012 public clauses. For a specific project, follow the contractual specification.
For a cross-reference PDF spec sheet at (DN/PN or A/K, Type, Material, Facing), email mafuze@hbyagada.com the tuple. The cross-ref table plus the firm quote come back together, typically within 2 hours during business days.
No. The 5 mm bolt circle difference at DN 100 / 100A means different gasket geometry. Always use one standard per system.
JIS B2220 SOP is the closest equivalent to EN 1092-1 Type 11 weld neck, though with shorter hub length and different dimensional schedule.
JIS B2220 is required for projects in Japan. For international projects with Japanese-sourced equipment, EN 1092-1 with K-class size mapping is often preferred.
EN 1092-1 and JIS B2220 serve different markets but cover similar products. Yajiada produces both standards with full EN 10204 type 3.1 traceability. Contact us with your destination market for a cross-reference quote.
Compiled from publicly available clauses of ASME B16.5, EN 1092-1, JIS B2220. For project-specific guidance, refer to the contractual specification.
Quick contact options for sourcing pipe flanges (ASME B16.5 / EN 1092-1 / JIS B2220 / BS 4504 / HG/T 20592) with full material traceability and shipping to 60+ countries.