CS Blind Flanges

TYPE: BLIND FLANGE. Material: A105, A350 LF2, A36, Q235, S235JR 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

Send Inquiry

Download

Product Description

Xi 'An QinSteel Trading Co., Ltd | Leading Manufacturer & Global Supplier of High-Quality CS Blind Flanges

When you need leak-proof pipeline isolation that stands up to high-pressure demands, CS Blind Flanges deliver unmatched reliability. Engineered from carbon steel grades like ASTM A105 and A350 LF2, our flanges comply with API 6A, ASME B16.5, and EN 1092-1 standards, ensuring seamless integration into oil refineries, gas pipelines, and industrial systems. With sizes from ½" to 144" and pressure ratings up to Class 2500, we provide solutions for both standard and custom configurations—backed by ISO 9001-certified quality and rapid global shipping.

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

Why Our CS Blind Flanges Stand Out?

1. Global Compliance, Local Reliability

Every CS Blind Flange meets regional certifications like GOST (Russia) and INMETRO (Brazil), alongside international standards. Whether you’re sealing a refinery pipeline in the Middle East or a water treatment plant in Europe, our flanges are designed for universal acceptance.

2. Engineered for Extreme Conditions

With pressure ratings up to 138 MPa (API 6A) and corrosion-resistant coatings, our products thrive in sour gas environments and sub-zero temperatures.

3. Ready When You Are

30,000+ CS Blind Flanges are pre-made in common sizes (12"–24") for urgent orders. Bulk shipments arrive at global ports within 15 days.

4. Customization Without Compromise

Need non-standard dimensions or RTJ facings? Our R&D team delivers tailored solutions with full NDT reports and material traceability.

Applications: Where Performance Matters

Oil & Gas: Isolate high-pressure pipelines in refineries and extraction sites.
Power Generation: Secure boiler systems and turbine connections.
Water Infrastructure: Seal large-diameter treatment pipelines (AWWA C207 compliant).
Petrochemicals: Corrosion-resistant flanges for acidic chemical transport.

Quality Assurance: No Shortcuts

Triple-Stage Inspections: Ultrasonic testing (UT), hydrostatic checks, and dimensional verification align with API Q1 protocols.
Certified Materials: Mill test certificates (MTC) and NACE MR-0175 reports provided.
Durable Packaging: Triple-layer moisture-proofing and wooden crates prevent transit damage.