Company Highlight:
Beijing Sinoworld Steel Material Co., Ltd.
Official Website
Beijing Sinoworld Steel Material Co., Ltd.
Official Website
Email: garvinliu@world-steelmaterial.com
Phone: 0086 18610666788
Address: Rm 1103, Shangpintaihu Bld 3#, Tongzhou District, Beijing
Phone: 0086 18610666788
Address: Rm 1103, Shangpintaihu Bld 3#, Tongzhou District, Beijing
As global industries continue to demand superior solutions for piping closure, flow control, and high-integrity connections, the role of a BL flange distributor has never been more crucial. With extensive applications in oil & gas, chemical, power generation, shipbuilding, and water treatment, blind flanges and their various types provide structural integrity and reliability under challenging operational conditions. In this in-depth guide, we discuss the latest market trends, review the major technical parameters, and showcase the competitive advantages provided by Beijing Sinoworld Steel Material Co., Ltd.—a globally recognized BL flange distributor.
1. Industry Trends & the Role of a BL Flange Distributor
Flange solutions, especially BL flange distributor offerings, have gained momentum due to:
- Growing demand for robust sealing and isolation in critical pipeline systems worldwide.
- The evolution of international standards (DIN, ASME, JIS, GB, ISO) ensures global interchangeability and safety.
- Advance in metallurgy and NDT (nondestructive testing) for assurance of material and weld soundness [Reference].
- The emergence of digital supply chain solutions empowers a new league of BL flange distributor with real-time inventory and client-focused services.
Notably, Beijing Sinoworld Steel Material Co., Ltd. stands as a premium BL flange distributor worldwide, combining R&D, manufacturing, and customized engineering.
2. Product Overview: Flanges (SO Flange, PL Flange, Blind Flange)
Product Name: Flanges (SO Flange, PL Flange, Blind Flange)
Standards: ANSI, BS, DIN, GB, ISO, JIS, ASME
Types: Carbon Steel Flanges, Stainless Steel Flanges, Alloy Steel Flanges
Color: Silver / Golden / Black / Yellow (customized)
Connection: Welding Flange
Material: Carbon Steel / Q235 / Stainless Steel / Alloy Steel
Shape: Circle Weld Neck Flange
Class: 150LB / 300LB / 600LB / 900LB / 2500LB
Thickness: Sch10-xxs (2-60mm)
Surface: FF, RF, TG, RJ
Standard or Nonstandard: as Customer Request
Product Page: Flanges Product Details
Standards: ANSI, BS, DIN, GB, ISO, JIS, ASME
Types: Carbon Steel Flanges, Stainless Steel Flanges, Alloy Steel Flanges
Color: Silver / Golden / Black / Yellow (customized)
Connection: Welding Flange
Material: Carbon Steel / Q235 / Stainless Steel / Alloy Steel
Shape: Circle Weld Neck Flange
Class: 150LB / 300LB / 600LB / 900LB / 2500LB
Thickness: Sch10-xxs (2-60mm)
Surface: FF, RF, TG, RJ
Standard or Nonstandard: as Customer Request
Product Page: Flanges Product Details
3. Key Technical Parameters of BL Flange Distributor
Technical Parameters (Summary Table)
| Parameter | Specification Range | International Standard | Application | Material Options |
|---|---|---|---|---|
| Nominal Diameter (DN) | DN15 – DN2000 | ANSI, DIN, JIS, GB, ISO | General Piping | Carbon / Stainless / Alloy Steel |
| Pressure Class | 150LB – 2500LB | ASME B16.5 / DIN EN 1092-1 | High Pressure Systems | Q235, 304, 316, 321, 904L, etc. |
| Surface Type | RF, FF, TG, RJ | ASME, DIN, BS | Sealing Applications | Custom as per request |
| Thickness | Sch10 – XXS (2mm – 60mm) | ANSI, DIN | Pipe End Closure | Carbon / Stainless / Alloy Steel |
| Finish/Color | Silver, Golden, Black, Yellow | ISO, Client Spec | Decorative/Anti-corrosive | As client order |
Technical Parameter Trend of BL Flange Distributor (Recent Years)
Major Technical Indexes of Flanges: Data Visualization
4. Types of Blind Flange and Relevant Standards
The BL flange distributor category typically refers to blind flanges. These are flange types used for sealing the end of a piping system or vessel opening. Popular standards and classifications include:
- DIN Flange Types: DIN 2527, DIN 2576, DIN 2633, among others, used extensively in Europe and areas adopting German standards.
- ASME/ANSI: ASME B16.5 and B16.47 cover blind flanges from DN15 up to DN2500, Class 150 - 2500.
- JIS: Japanese standard, e.g., JIS B2220, for blind and other flange types.
- Surface Finishes: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Tongue & Groove (TG).
- Material Variety: From Q235 to advanced stainless steels such as 304, 316, and alloy grades suitable for offshore & cryogenic environments.
5. Application Scenarios of BL Flange Distributor Solutions
- Oil & Gas field gathering, main pipelines, and separation stations.
- Petrochemical and refinery plant unit connections.
- Power plant feed water, cooling, and boiler loop closures.
- Shipyard piping—ballast, bilge, and tank closing.
- Water treatment—waste water line endings and testing junctions.
- HVAC fire-fighting ring main isolations.
- Food, pharma, and beverage piping closures (using high-purity stainless steel flanges).
6. Professional Q&A: Industry-Standard Terms Explained
Q1: What is a Blind Flange?
A blind flange is a solid disk used to block off a pipeline or create a stop. It is most commonly used at the end of pipe runs or vessels to provide a positive isolation, allowing for easy maintenance or future extensions.
A blind flange is a solid disk used to block off a pipeline or create a stop. It is most commonly used at the end of pipe runs or vessels to provide a positive isolation, allowing for easy maintenance or future extensions.
Q2: Which materials are most frequently chosen for manufacturing blind flanges?
Common options include Carbon Steel (e.g., ASTM A105), Stainless Steel (e.g., SS304, SS316), Alloy Steel, and corrosion-resistant grades like 904L for aggressive fluids.
Common options include Carbon Steel (e.g., ASTM A105), Stainless Steel (e.g., SS304, SS316), Alloy Steel, and corrosion-resistant grades like 904L for aggressive fluids.
Q3: What is the significance of ‘Pressure Class’ when selecting a BL flange distributor?
'Pressure Class' (like 150LB, 600LB, 900LB) denotes the maximum working pressure a flange can safely handle at specific temperatures. The selection depends on piping media, system pressure, and temperature limits.
'Pressure Class' (like 150LB, 600LB, 900LB) denotes the maximum working pressure a flange can safely handle at specific temperatures. The selection depends on piping media, system pressure, and temperature limits.
Q4: How do DIN flange types differ from ANSI or JIS flanges?
DIN flanges (per German standards) feature different bolt hole arrangement, dimensions and pressure designations compared to ANSI (American), BS (British), or JIS (Japanese) standard flanges. It is crucial that all parts in a system match the chosen standard.
DIN flanges (per German standards) feature different bolt hole arrangement, dimensions and pressure designations compared to ANSI (American), BS (British), or JIS (Japanese) standard flanges. It is crucial that all parts in a system match the chosen standard.
Q5: What is ‘Face Type’ and why does it matter (FF, RF, TG, RJ)?
'Face Type' refers to the sealing surface—Flat Face (FF), Raised Face (RF), Tongue & Groove (TG), and Ring Joint (RJ). The choice depends on pressure/class, leak tightness required, and gasket compatibility.
'Face Type' refers to the sealing surface—Flat Face (FF), Raised Face (RF), Tongue & Groove (TG), and Ring Joint (RJ). The choice depends on pressure/class, leak tightness required, and gasket compatibility.
Q6: What tests and certifications should a reputable BL flange distributor provide?
Certifications include: EN10204 3.1/3.2, Material Test Certificates, Hydrostatic and Pneumatic Tests, Radiographic & Ultrasonic NDT reports, and full traceability (e.g., as per PED, API standards).
Certifications include: EN10204 3.1/3.2, Material Test Certificates, Hydrostatic and Pneumatic Tests, Radiographic & Ultrasonic NDT reports, and full traceability (e.g., as per PED, API standards).
Q7: How is a blind flange installed?
Blind flanges are installed by bolting onto a mating flange with a suitable gasket in between, aligning bolt holes precisely, and torquing bolts in a cross-pattern to ensure uniform sealing; for welded blind flanges (Weld Neck types), welding is required per standard procedures.
Blind flanges are installed by bolting onto a mating flange with a suitable gasket in between, aligning bolt holes precisely, and torquing bolts in a cross-pattern to ensure uniform sealing; for welded blind flanges (Weld Neck types), welding is required per standard procedures.
7. Why Beijing Sinoworld Steel Material Co., Ltd. As Your BL Flange Distributor?
- 20+ years of export experience with end-to-end bl flange distributor project support.
- Strict compliance with global norms: ASME, DIN, ISO, JIS, PED, API.
- Custom engineering: special pressure ratings, exotic alloys, and fast delivery on bulk/urgent projects.
- Advanced inspection (Spectro Test, UT, PT, RT, PMI) and third-party witness (SGS, BV, Lloyd's).
- Dedicated English-speaking engineers and after-sales support for global customers.
Contact: garvinliu@world-steelmaterial.com |
0086 18610666788
Address: Rm 1103, Shangpintaihu Bld 3#, Tongzhou District, Beijing
Product Page: BL Flange Distributor Solutions
Address: Rm 1103, Shangpintaihu Bld 3#, Tongzhou District, Beijing
Product Page: BL Flange Distributor Solutions
8. Further Reading & References
Post time: Th7 . 26, 2025 11:01
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