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B16.48 Spectacle Blind Flange
Trusted B16.48 Spectacle Blind Flange Manufacturer | Global Bulk Supply
Xi 'An QinSteel Trading Co., Ltd – ASME/API-Certified Supplier of High-Pressure Pipeline Components for Oil & Gas Industries
Engineered for Precision Isolation in Demanding Environments
When you need reliable pipeline isolation solutions, our B16.48 Spectacle Blind Flange stands as a benchmark for safety and performance. Designed to ASME B16.48 specifications, these flanges provide a secure method to block, redirect, or permit flow in high-pressure systems across refineries, offshore platforms, and chemical plants. Available in sizes from ½” to 24” with pressure ratings up to Class 2500, they’re crafted to withstand extreme temperatures, corrosive media, and repetitive stress.
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 | DN 15 ~ 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 |
Material Excellence
- Primary Materials: ASTM A105 Carbon Steel, A350 LF2 Low-Temp Steel, A182 F304/316 Stainless Steel
- Compatible Standards: ASME B16.5, B16.36, API 6A, EN 1092-1, JIS B2220
Why Our B16.48 Spectacle Blind Flanges Outperform?
1. Zero-Leak Guarantee
Machined to ±0.01mm tolerances with RTJ, RF, or FF facings for perfect seal integrity under 1.5x rated pressure.
2. Corrosion-Resistant Builds
Optional Inconel coatings or duplex steel (F51/F53) for sour service environments per NACE MR0175.
3. Global Compliance Made Simple
Pre-packaged with CE, TUV, or API 6D certifications to accelerate customs clearance in 100+ countries.
4. Rush Order Priority
75% raw material inventory coverage enables 10-day lead times on bulk orders (500+ units).
Key Applications
- 🔧 Shutting down refinery piping for maintenance
- 🛢️ Isolating sections in subsea oil & gas pipelines
- ⚡ Managing flow in power plant steam systems
- 🧪 Controlling chemical processing line pressure
Why Partner With Us?
✅ 25+ Years of Metalworking Expertise
Our engineers have delivered 10,000+ custom flange solutions since 1998.
✅ ASME-Certified Production
Every B16.48 Spectacle Blind Flange undergoes hydrostatic testing, PMI checks, and 3D measurement.
✅ Damage-Proof Logistics
Wooden crates with edge protectors and desiccant packets ensure pristine condition upon arrival.
Quality Assurance Protocol
1. Material Traceability: Mill test reports for every batch
2. Non-Destructive Testing: Liquid penetrant & ultrasonic exams
3. Surface Finish: 125-250 µin Ra for optimal gasket contact
Quality Control
Factory Equipment
Shipping Packaging
FAQs
Q: Can you match non-ASME flange dimensions?
A: Yes – We support OEM customization for DIN, JIS, or GOST standards.
Q: How do you prevent rust during ocean shipping?
A: Flanges receive VCI coating and are vacuum-sealed in anti-corrosion film.
Q: Is PMI testing included?
A: Absolutely – We provide third-party validated material composition reports.
Q: Do you offer installation support?
A: Free technical drawings and video guides come with every bulk order.
Contact Us
📧 Email: info@sxqinsteel.com
🌐 Ask About:
- Project-Specific Material Recommendations
- Volume Discounts (1,000+ Units)
- Emergency 72-Hour Delivery Options
Serving EPC Contractors and Plant Operators Since 1998 with B16.48 Spectacle Blind Flange.
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