What is the working pressure limit for Class 2500 flanges?

ASME B16.5Class 2500#Weld Neck (WN)Capacity: Strictly Up to 50 kg

ASME B16.5 Class 2500 Weld Neck Flange Dimensions & Weight

Precision closed-die drop forged and CNC machined from heat-tracked billets at our Rajkot manufacturing facility. Engineered with unbroken grain flow for high-pressure service up to 6170 psi @ 100°F (425.4 bar ambient), adhering to EN 10204 3.1 and ISO 9001:2015 quality requirements.

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Rajkot, Gujarat (IN-GJ 22.2597° N, 70.8123° E)

Deep-Water Port Mundra (240 km) & Port Kandla (230 km)

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ASME B16.5 Class 2500 Weld Neck Flanges represent the apex of ASME B16.5 pressure containment, rated to 6170 psi. Solid drop-forged up to 50 kg per piece in Rajkot, Gujarat for hyperbaric subsea and severe military ordnance handling.

StandardASME B16.5

Pressure Rating6170 psi @ 100°F (425.4 bar ambient)

Facing FinishRing Type Joint (RTJ) Groove Standard

Max Unit WeightUp to 50 kg max

ASME B16.5 Class 2500 Weld Neck Flange Dimensions & Weight — Dimensions & Weight Chart

All dimensions in millimeters (mm) and nominal weights in kilograms (kg) strictly manufactured up to 50 kg per piece.

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NPS	Metric DN	Outside Dia (OD mm)	Flange Thickness (mm)	Bolt Circle PCD (mm)	No. of Bolts	Hole Dia (mm)	Approx Weight (kg)
1/2"	DN15	133 mm	30.2 mm	89 mm	4	22 mm	4.8 kg✔ (≤50kg)
3/4"	DN20	140 mm	31.8 mm	95 mm	4	22 mm	6.2 kg✔ (≤50kg)
1"	DN25	159 mm	35 mm	108 mm	4	25 mm	8.8 kg✔ (≤50kg)
1-1/2"	DN40	203 mm	44.5 mm	146 mm	4	32 mm	19.5 kg✔ (≤50kg)
2"	DN50	235 mm	50.8 mm	171.5 mm	8	28 mm	35 kg✔ (≤50kg)

Engineering Note: Weights shown reflect standard carbon steel (ASTM A105, density 7.85 g/cm³). For Stainless Steel (304L/316L, density 8.00 g/cm³) or Duplex 2205 (7.80 g/cm³), multiply nominal weight by the metallurgical density ratio. All Jayesh Forge production strictly maintains our 50 kg max piece limit.

Available Metallurgical Grades

ASTM A105 — 100% heat batch tracked with full chemical and mechanical certification.
ASTM A350 LF2 — 100% heat batch tracked with full chemical and mechanical certification.
SS 316L — 100% heat batch tracked with full chemical and mechanical certification.
Duplex F51 — 100% heat batch tracked with full chemical and mechanical certification.

View complete metallurgy & EN 10204 3.1 inspection protocols

Primary Engineering Applications

Ultra-High Pressure Hydraulic Systems
Deepwater Wellheads
Chemical Synthesis Autoclaves

Inquire about custom machining or special facings (RTJ/Tongue-Groove)

Rajkot Facility Manufacturing & Global Logistics Corridors

This component is hot-forged on high-speed closed-die friction presses and CNC finished at our Rajkot manufacturing center located at Plot No. 42/43, GIDC Industrial Estate, Rajkot, Gujarat - 360002, India. Global ocean freight dispatches weekly via Port Mundra (240 km) and Port Kandla (230 km) with rapid transit to Houston USA, Rotterdam Europe, and Dubai UAE.

ASME Standards Committee View Rajkot Plant Location (Google Maps) Back to All 56 Flange Standards