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Yancheng BL Flange
QS Flange: Yancheng BL Flange
Name: Yancheng BL Flange
Material: Q235
Manufacture Standard: ASME B16.5
Face: Raised Face
Size: 1-1/2 inch
Class: 150LB
Process: Forged Steel Flange
Coating: with Black Anti-rust Coating
Feature: Strong Stiffness, Good Sealing
Usage: For Pipeline fittings, Industry, Pressure vessels, Water conservancy, Electricity, power stations, etc
Material: Q235
Manufacture Standard: ASME B16.5
Face: Raised Face
Size: 1-1/2 inch
Class: 150LB
Process: Forged Steel Flange
Coating: with Black Anti-rust Coating
Feature: Strong Stiffness, Good Sealing
Usage: For Pipeline fittings, Industry, Pressure vessels, Water conservancy, Electricity, power stations, etc
Quantity
The Yancheng BL Flange is a forged steel blind flange manufactured in Yancheng City, Jiangsu Province – one of China’s most concentrated petrochemical and valve component manufacturing clusters. This 1-1/2-inch, Class 150LB raised face flange is produced in full compliance with ASME B16.5, using domestic Q235 carbon steel billet. It serves as a reliable isolation or closure element in low‑pressure piping systems, pressure vessels, and tank nozzles.
Material & Manufacturing
Made from Q235 – a mild carbon structural steel with good weldability and formability – the flange undergoes hot forging to refine its grain structure, eliminating internal voids and improving directional strength. The forging process, combined with controlled cooling, yields strong stiffness and resistance to deformation under bolt tightening and thermal cycling. Each piece is machined on CNC lathes to ensure precise bore diameter, bolt circle, and thickness tolerances per ASME B16.5. The raised face (RF) sealing surface is finished with a concentric serration (125–250 µinch roughness) to provide initial bite with spiral wound or non‑asbestos gaskets, delivering good sealing even in fluctuating temperature environments.
Made from Q235 – a mild carbon structural steel with good weldability and formability – the flange undergoes hot forging to refine its grain structure, eliminating internal voids and improving directional strength. The forging process, combined with controlled cooling, yields strong stiffness and resistance to deformation under bolt tightening and thermal cycling. Each piece is machined on CNC lathes to ensure precise bore diameter, bolt circle, and thickness tolerances per ASME B16.5. The raised face (RF) sealing surface is finished with a concentric serration (125–250 µinch roughness) to provide initial bite with spiral wound or non‑asbestos gaskets, delivering good sealing even in fluctuating temperature environments.
Coating & Corrosion Protection
To withstand outdoor storage, transportation, and humid service conditions, every Yancheng BL Flange receives a uniform **black anti‑rust coating** (oil‑based temporary rust preventive). This coating offers 6–12 months of indoor/outdoor protection before final installation. For projects requiring longer preservation, a solvent‑removable clear film can be applied upon request.
To withstand outdoor storage, transportation, and humid service conditions, every Yancheng BL Flange receives a uniform **black anti‑rust coating** (oil‑based temporary rust preventive). This coating offers 6–12 months of indoor/outdoor protection before final installation. For projects requiring longer preservation, a solvent‑removable clear film can be applied upon request.
Performance & Application Scenarios
Rated for 150LB (approximately 285 psi at ambient temperature per ASME B16.5), this flange is ideally suited for:
- Pipeline fittings – blanking off dead‑end lines, future tie‑ins, or test ports.
- Pressure vessels & storage tanks – manhole covers, inspection openings, and drain nozzles.
- Water conservancy – pump station headers, irrigation distribution boxes, and sediment blow‑off lines.
- Electricity & power stations – cooling water circuits, auxiliary steam systems, and firewater ring mains.
Its robust forged construction ensures secure isolation during maintenance, hydrotesting, or emergency shutdowns.
Rated for 150LB (approximately 285 psi at ambient temperature per ASME B16.5), this flange is ideally suited for:
- Pipeline fittings – blanking off dead‑end lines, future tie‑ins, or test ports.
- Pressure vessels & storage tanks – manhole covers, inspection openings, and drain nozzles.
- Water conservancy – pump station headers, irrigation distribution boxes, and sediment blow‑off lines.
- Electricity & power stations – cooling water circuits, auxiliary steam systems, and firewater ring mains.
Its robust forged construction ensures secure isolation during maintenance, hydrotesting, or emergency shutdowns.
Yancheng’s Industrial Edge
Yancheng hosts over 300 forging and flange enterprises, supported by an integrated supply chain of steel mills, heat treatment furnaces, and machining workshops. Local manufacturers benefit from abundant electricity, skilled labour, and proximity to major ports (Lianyungang and Shanghai), enabling cost‑effective production and just‑in‑time delivery. The Yancheng BL Flange reflects this regional expertise – combining standardized quality with competitive pricing, and meeting export requirements to Southeast Asia, the Middle East, and South America.
Yancheng hosts over 300 forging and flange enterprises, supported by an integrated supply chain of steel mills, heat treatment furnaces, and machining workshops. Local manufacturers benefit from abundant electricity, skilled labour, and proximity to major ports (Lianyungang and Shanghai), enabling cost‑effective production and just‑in‑time delivery. The Yancheng BL Flange reflects this regional expertise – combining standardized quality with competitive pricing, and meeting export requirements to Southeast Asia, the Middle East, and South America.
Quality Assurance & Compliance
Each flange is positively identified with grade, size, rating, and heat number. Material test certificates (MTC) per EN 10204 3.1 are available, with optional third‑party inspection (SGS, BV, or TÜV). The product complies fully with ASME B16.5 dimensional and pressure‑temperature requirements, ensuring interchangeability with any standard companion flange.
Each flange is positively identified with grade, size, rating, and heat number. Material test certificates (MTC) per EN 10204 3.1 are available, with optional third‑party inspection (SGS, BV, or TÜV). The product complies fully with ASME B16.5 dimensional and pressure‑temperature requirements, ensuring interchangeability with any standard companion flange.
Conclusion
The Yancheng BL Flange offers a balanced solution of strength, sealability, and affordability. Whether for routine pipeline closures or critical pressure‑retaining services, its forged Q235 construction, raised face design, and anti‑rust protection make it a dependable choice. Backed by Yancheng’s mature manufacturing ecosystem, this flange delivers consistent quality, short lead times, and responsive technical support – solidifying its position as a preferred blind flange for industrial, utility, and energy projects worldwide.
The Yancheng BL Flange offers a balanced solution of strength, sealability, and affordability. Whether for routine pipeline closures or critical pressure‑retaining services, its forged Q235 construction, raised face design, and anti‑rust protection make it a dependable choice. Backed by Yancheng’s mature manufacturing ecosystem, this flange delivers consistent quality, short lead times, and responsive technical support – solidifying its position as a preferred blind flange for industrial, utility, and energy projects worldwide.
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