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  • Spectacle Blind Flange
  • Spectacle Blind Flange
  • Spectacle Blind Flange
  • Spectacle Blind Flange

Spectacle Blind Flange

  • Type: Spectacle Blind Flange
  • Class: 150#-2500#, 150LBS-2500LBS
  • Size: 1/2" (15 NB) to 24" (600NB)
  • Service: Welding, Fabricated, Customized

Spectacle Blind Flange Description

A spectacle blind flange is a specialty flange made of  half of the blind plate and half of the ring attached in the middle by a small section of steel. It's a kind of pipe parts, mainly for the convenience of maintenance. Spectacle blind flanges are most commonly used for pipeline flanges that need to change the process.

We HT PIPE is the manufacturer that provide all kinds of  steel flanges like Spectacle Blind Flanges, Weld Neck Flanges, Slip On Flanges, Socket Weld Flanges, Threaded Flanges and so on, and also other special flanges according to the client's requirement.
Spectacle Blind Flange Specification:

Standard Type Class Size
ASME B16.5 WN/LWN/SO/Blind/Lap Joint 150#-2500# 1/2"-24"(Except Blind Flange 2500lb 1/2"-12")
EN1092-1:2002 Plate flange for welding/loose plate flange with weld-on plate collar or for lapped pipe end/Blind Flange/WN flange PN2.5-PN100 DN10-DN4000
Other WN/LWN/SO/SW/blind/plate/threaded/anchor/swivel/girth/lap joint/reducing/orifice
spectacle blind/paddle blind/spacer ring/orifice plate/bleed ring
Speical Products: Rings/Forgings/Disc/Shaft Sleeve
Sealing Surface RF FF RTJ TF GF LF LM
Flange Face Finish Stock Finish/Spiral Serrated/Concentric Serrated/Smooth Finish(Ra 3.2 and 6.3 micrometers)
125-250 AARH(it is called smooth finish)
250-500 AARH(it is called stock finish)
Coating Vanish, yellow paint, anti-rust oil, galvanizing etc
flange surfce coating treatment

Spectacle Blind Flange  Material Grades:

Carbon Steel ASTM /ASME A/SA105(N), A350 LF2/LF3, A694 F52, F56, F60, F65, F70
Alloy Steel ASTM/ASME A/SA 182  F5, F9, F11, F22, F91
Stainless Steel ASTM/ASME A/SA 182 F304, 304L, 304H, 310H, 316, 316H, 316L,
316Ti, 317, 317L, 321, 321H, 347, 347H, 904L
Duplex and
Super Duplex
ASTM/ASME A/SA 182 F44, F45, F51, F53, F55, F60, F61,
S31803, S32205, S32550, S31254, SMO254, S32750, S32760, S32950
Nickel Alloy Steel ASTM/ASME B/SB 564 UNS N02200(NICKEL 200), UNS N04400, (MONEL 400),
UNS N08825( INCOLOY 825), UNS N06600(INCONEL 600), UNS N06601(INCONEL 601),
UNS N06625(INCONEL 625), UNS N10276(HASTELLOY C276)
ASTM/ASME B/SB160 UNS N02201(NICKEL 201),  ASTM B/SB472 UNS N08020(Alloy 20)
Copper Alloy ASTM/ASME B/SB151 UNS N07060, 71500, C70600(CuNi 90/10), C71500(CuNi 70/30)
Titanium ASTM/ASME B/SB381 Grade 2, Grade 5, Grade 7
Manufacturer, exporter & supplier of ASME/ANSI B16.5 Carbon steel Spectacle Blind Flanges, Alloy steel Spectacle Blind Flanges, Nickel alloy Spectacle Blind Flanges,  Stainless steel Spectacle Blind Flanges, Duplex steel Spectacle Blind Flanges, ASTM A105/105N, ASTM A350 Lf2, ASTM A694, ASTM A182, ASTM B564 Spectacle Blind Flanges manufaturer in Zhengzhou HT PIPE.

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