SS Blind Flanges

TYPE: BLIND FLANGE. Material: A182 F304/F304H/F316/F310/F316Ti/F321/F347/F44/F53/F55,F904L, UNS 31803 etc. Size: 1/2"~144" Pressure: CLASS 150 ~ CLASS 2500, DN6 ~ DN400 Flange Facing: RF, FF, RTJ, M&F, T&G. Standard: ASME B16.5/B16.47, AWWA C207, API 6A, AS 2129, BS 450A, EN1092-1, JIS B2220, MSS SP-44 Customization: OEM/ODM service Samples: Sample service available

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Product Description

Xi 'An QinSteel Trading Co., Ltd | Premium SS Blind Flanges Manufacturer & Global Supplier

Trusted manufacturer of precision-engineered SS Blind Flanges, backed by GMP-certified production, API/ISO compliance, and rapid global delivery.

What Are SS Blind Flanges?

The products are essential sealing components for pipeline systems in high-pressure, corrosive environments. Made from durable stainless steel alloys, these flanges provide leak-proof performance and exceptional corrosion resistance. At Xi 'An QinSteel, we engineer our stainless steel blind flanges to meet ASME, API, and EN standards, ensuring reliability in oil & gas, chemical processing, and marine applications.

Material Specifications

STANDARD	TYPE	SIZE	PRESSURE
ASME B16.5	WN, SO, SW, BLD, THREADED, LP	1/2" ~ 24"	CLASS 150 ~ 2500
ASME B16.36	WN, SO, THREADED	1/2" ~ 24"	CLASS 300LB ~ 2500
ASME B16.47	WN BLD	26" ~ 60"	CLASS 75 ~ 900
ASME B16.48	SPECTACLE BLANKS, SPADES, RING SPACERS	1/2" ~ 24"	CLASS 150 ~ 2500
AWWA C207	STEEL RING, BLD, STEEL HUB	4" ~ 96"	86 ~ 275 PSI
API 6A	WN, BLD, THREADED, INTEGRAL, TEST	2-1/16" ~ 20-3/4"	13.8 MPa ~ 138.0 MPa
API 605	WN	26" ~ 60"	CLASS 150 ~ 900
SANS 1123	WN, PLATE, SCREWED, SO, LOOSE, BLANK, INTEGRAL	DN 10 ~ 3600	250 ~ 4000 kPa
AS 2129	BLD, PLATE, BOSS, WN	DN15 ~ 1800	TABLE A ~ TABLE T
BS 3293	SO, WN	26" ~ 48"	CLASS 150 ~ 600
BS 4504	PLATE, LOOSE, BLANK, WN, SO, THREADED, WO PLATE, INTEGRAL	DN 10 ~ 4000	PN 6 ~ 40
EN 1092-1	PLATE, LOOSE, BLIND, WN, SO, THREADED, WO PLATE, INTEGRAL	DN 10 ~ 3600	PN 6 ~ 400
JIS B2220	SOP, SOH, SW, WN, LJ, TR, IT, BL	DN 10 ~ 1500	5 ~ 63 K
MSS SP-44	BLD, WN	12" ~ 60"	CLASS 150,19.6bar ~ CLASS 900, 153.1 bar

Built to Last: Materials & Performance

Grades: ASTM A182 F304/316L, duplex steels (F44/F53/F55), and super austenitic alloys (904L, UNS 31803).
Compliance: Certified to API 6A, EN 1092-1, ASME B16.5, and JIS B2220.
Facing Options: RF, FF, RTJ, M&F, T&G for perfect sealing.

Why Our SS Blind Flanges Stand Out？

✅ Extreme Pressure Resilience: Engineered for CLASS 150 to 2500 systems.

✅ Corrosion Resistance: Ideal for acidic, marine, and high-temperature environments.

✅ Global Availability: ASME, API, and EN-compliant flanges ready for immediate dispatch.

✅ Custom Solutions: OEM/ODM support for non-standard sizes, coatings, or branding.

Applications Across Industries

Sealing pipeline ends in oil refineries and offshore platforms.
High-pressure systems in chemical plants and power generation.
Marine infrastructure exposed to saltwater corrosion.

Why Partner With Us?

GMP-Certified Quality: Rigorous checks from material sourcing to final packaging.
Bulk Order Expertise: Scalable production for 5,000+ units/year contracts.
Fast Turnaround: 15–20 days standard lead time with expedited options.
Damage-Free Shipping: Wooden crates with anti-rust coatings and shock-absorbent fillers.