Are Class 1500 blind flanges proof pressure tested?

ASME B16.5Class 1500#Blind (BL)Capacity: Strictly Up to 50 kg

ASME B16.5 Class 1500 Blind 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 3705 psi @ 100°F (255.5 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 1500 Blind Flanges seal 3705 psi severe lines. Forged in solid closed dies at Rajkot strictly up to 50 kg per piece with ultrasonic flaw detection.

StandardASME B16.5

Pressure Rating3705 psi @ 100°F (255.5 bar ambient)

Facing FinishRTJ Groove / Heavy Raised Face

Max Unit WeightUp to 50 kg max

ASME B16.5 Class 1500 Blind 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	121 mm	22.3 mm	82.5 mm	4	22 mm	3.8 kg✔ (≤50kg)
1"	DN25	149 mm	28.6 mm	101.5 mm	4	25 mm	7.5 kg✔ (≤50kg)
1-1/2"	DN40	178 mm	31.8 mm	124 mm	4	28 mm	13 kg✔ (≤50kg)
2"	DN50	216 mm	38.1 mm	165 mm	8	25 mm	22.5 kg✔ (≤50kg)
3"	DN80	267 mm	47.7 mm	203 mm	8	32 mm	50 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.
SS 316L — 100% heat batch tracked with full chemical and mechanical certification.
A350 LF2 — 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

Offshore High-Pressure Isolation
Supercritical Steam Manways
Subsea Exploration

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