Contact Platform Support
Help CenterDouble-layer Spring Washer Used in Petrochemical Pipeline Flange Connections for Sealing and Locking
Product Spotlights
Related Products
-
304 Stainless Steel Double-layer Spring Washer DIN 127 M8 M10 M12 Anti-looseningNegotiableMOQ: 1 Piece -
Double-layer Spring Washer Factory Direct With Technical Support and Custom Size AvailableNegotiableMOQ: 1 Piece
-
Double-layer Curved Spring Washer 5mm Thickness 304 Stainless Steel for High Torque ApplicationsNegotiableMOQ: 1 Piece
-
Double-layer Spring Washer 8.8 Grade Carbon Steel Zinc Plated Lock Washer for FastenersNegotiableMOQ: 1 Piece
-
Double-layer Spring Washer M6-M20 Heavy Duty Tension Washer for Industrial BoltsNegotiableMOQ: 1 Piece
Double-layer Spring Washer Used in Petrochemical Pipeline Flange Connections for Sealing and Locking – engineered by Anping County Boli Hardware Wiremesh Products Factory, a trusted manufacturer since 1998, with over 25 years of expertise in producing high-quality fastening components. Our double-layer spring washers are specifically designed to meet the demanding requirements of petrochemical pipeline systems, where reliable sealing and locking are critical to prevent leaks and loosening under extreme conditions. With an annual export value exceeding US$5 million and shipments to major ports including Tianjin, Qingdao, Shanghai, and Foshan, we deliver globally to industries such as oil & gas, chemical processing, and power generation. Our products are manufactured with precision and undergo strict quality control to ensure long-term performance in harsh environments.
Product Features & Technical Specifications
- Double-layer design – Provides enhanced spring force and load distribution, ensuring effective sealing and locking even under high vibration and thermal cycling.
- High-quality materials – Available in spring steel (65Mn, 60Si2Mn) or stainless steel (304, 316) for excellent corrosion resistance and durability in petrochemical environments.
- Precise dimensions – Manufactured within tight tolerances to fit standard flange bolts and nuts, reducing installation errors and improving sealing performance.
- Versatile surface treatment – Options include zinc plating, black oxide, phosphate, or plain finish, each offering different levels of corrosion protection and friction characteristics.
- Customizable sizes – Standard range from M6 to M30, with non-standard sizes available upon request to meet specific pipeline requirements.
- Compliance with industry standards – Can be produced according to DIN127, DIN7980, or customer-specific drawings, ensuring compatibility with international flange standards.
Technical Parameters (Common Specifications)
| Parameter | Data |
|---|---|
| Material Hardness (HRC) | 38–46 (spring steel), 25–35 (stainless steel) |
| Operating Temperature Range | -40°C to +200°C (standard), up to 400°C (optional high-temp material) |
| Thickness (per layer) | 1.0 mm – 4.0 mm (depending on size) |
| Coil Diameter | 1.5× to 2.5× bolt diameter |
| Surface Friction Coefficient | 0.12–0.18 (zinc plated), 0.10–0.14 (plain) |
Why choose our double-layer spring washers for petrochemical flanges? The unique double-coil structure generates a higher axial force compared to single-layer washers, effectively compensating for thermal expansion, bolt creep, and vibration-induced loosening. This ensures a reliable seal in flange joints, preventing hazardous leaks of flammable or corrosive fluids. Our washers are tested for consistent spring-back performance and long-term fatigue resistance, making them an ideal choice for critical piping systems.
Trusted by Global Markets – Backed by 25+ Years of Experience
As a leading manufacturer based in Hengshui, Hebei, China, Anping County Boli Hardware Wiremesh Products Factory has been serving customers across North America, South America, Europe, Southeast Asia, Africa, Oceania, the Middle East, and more. Our annual export value of US$5 million to US$10 million reflects our strong production capacity and commitment to quality. We offer flexible shipping options from major ports including Tianjin, Qingdao, Shanghai, and Foshan, ensuring timely delivery to your project site.
We understand that every pipeline system has unique requirements. That’s why we provide customizable solutions – from material selection to surface treatment and packaging. Our team of experienced engineers can assist you in selecting the optimal washer configuration for your application. We also offer samples for testing before bulk orders, helping you validate performance in your specific environment.
Contact us today to discuss your petrochemical flange sealing and locking needs. With our proven track record, competitive pricing, and reliable quality, we are your ideal partner for critical fastening components. Let us help you enhance the safety and efficiency of your pipeline operations.
Frequently Asked Questions (FAQ)
-
Q: What materials are available for double-layer spring washers?
A: We offer spring steel (65Mn, 60Si2Mn) and stainless steel (304, 316). For special corrosion requirements, other alloys can be discussed. -
Q: What is the standard size range?
A: Our standard sizes cover M6 to M30. Custom sizes can be produced based on your drawings or specific bolt dimensions. -
Q: Can these washers be used in high-temperature environments?
A: Standard materials work up to 200°C. For higher temperatures (up to 400°C), we recommend stainless steel or special heat-treated alloys. Please inform us of your operating temperature. -
Q: How do double-layer washers improve sealing compared to single-layer ones?
A: The double-layer design provides more elastic deformation capacity, maintaining a constant preload force even when the joint experiences thermal expansion or vibration. This reduces the risk of bolt loosening and flange leakage. -
Q: Do you provide samples for testing?
A: Yes, we offer samples (usually a few pieces) for quality evaluation. You only need to cover shipping costs. Contact us for details. -
Q: What surface treatments are available?
A: Common options include zinc plating (blue/white/yellow), black oxide, phosphate, and plain finish. Each treatment provides different corrosion resistance and friction characteristics. -
Q: How long does delivery typically take?
A: For standard sizes, production takes 10–15 business days after order confirmation. Bulk orders or custom sizes may require 20–30 days. We ship via sea, air, or express as per your requirement.
Send Inquiry to This Supplier
You May Also Like
-
Double-layer Spring Washer for Automotive Assembly Line Preventing Bolt Loosening in Heavy MachineryNegotiableMOQ: 1 Piece
-
Double-layer Spring Washer 1 Year Warranty With Mill Test Report for Quality AssuranceNegotiableMOQ: 1 Piece
-
Heavy Duty Double Coil Spring Washer M16 Carbon Steel 8.8 Grade MetricNegotiableMOQ: 1 Piece
-
Zinc Plated Carbon Steel M12 Double Coil Spring Washer 10.9 Grade HardnessNegotiableMOQ: 1 Piece
-
Double Coil Spring Washer for Automotive Suspension Systems Anti-Shake LockingNegotiableMOQ: 1 Piece
-
Double Coil Spring Washers Used in Heavy Machinery Assembly to Prevent Bolt LooseningNegotiableMOQ: 1 Piece
-
Double Coil Spring Washers 100% Inspection Passed Standard Compliant Reliable LockingNegotiableMOQ: 1 Piece
-
Black Oxide Coated Double Coil Spring Washer M10 DIN 7980 Spring Lock WasherNegotiableMOQ: 1 Piece
-
304 Stainless Steel M8 Double Coil Spring Washer DIN 127B Anti-Loosening FastenerNegotiableMOQ: 1 Piece
-
Double Coil Spring Washer With 1-Year Warranty and Mill Test Report AvailableNegotiableMOQ: 1 Piece
