Recommend Products
Name: Xiamen Neoprene Isolation Gasket Standard: ASME B16.21 Material: Neoprene Size: 3 Inch Pressure: 150LB Type: Full Face Application: For Chemical and Corrosion Resistance Customized Service: YesQS Gasket: Xiamen Neoprene Isolation Gasket
Name: Zhejiang Gylon 3500 Insulating Gasket Set Material: Gylon 3500 Size: 4 Inch Pressure: 150# Thickness: 1/8" Type: F Sleeves: G11 Washers: G11 + ZPS Standard: For ASME B16.5 Flange Price: 65 - 85 USD MOQ: 1 PCS Delivery Date: 7 - 35 Days Customization: YesQS Gasket: Gylon 3500 Insulating Gasket Set
Name: Xiamen 40inch Gasket Insulation Sets Material: UNIFLUOR-7551 Size: 40 Inch Pressure: 150# Thickness: 1/8" Type: F Sleeve: G11 Washers: G11+ ZPS Standard: For ASME B16.47B-WN-RF Price: 1250 - 1450 USD MOQ: 1 PCS Delivery Date: 7 - 35 Days Customization: YesQS Gasket: Xiamen 40inch Gasket Insulation Sets
Name: Fujian Gylon3500 Insulation Gasket Sets Material: Gylon 3500 Size: 6 Inch Pressure: 150# Thickness: 1/8" Type: F Sleeves: G11 Washers: G11 + ZPS Standard: For ASME B16.5 Flange Price: 110 - 125 USD MOQ: 1 PCS Delivery Date: 7 - 35 Days Customization: YesQS Gasket: Fujian Gylon3500 Insulation Gasket Sets
Xiamen Phenolic insulation Gasket Set
QS Gasket: Xiamen Phenolic insulation Gasket Set
Name: Xiamen Phenolic insulation Gasket Set
Material: Phenolic
Size: 8 Inch, RX50
Pressure: 5000 psi
Type: D
Sleeve: Mylar
Washers: Phenolic+ ZPS
Standard: For API 6A Flange
Price: 199 - 249 USD
MOQ: 1 PCS
Delivery Date: 7 - 35 Days
Customization: Yes
Material: Phenolic
Size: 8 Inch, RX50
Pressure: 5000 psi
Type: D
Sleeve: Mylar
Washers: Phenolic+ ZPS
Standard: For API 6A Flange
Price: 199 - 249 USD
MOQ: 1 PCS
Delivery Date: 7 - 35 Days
Customization: Yes
Quantity
This product is specially designed for API 6A flange connections, using high-strength phenolic glass fiber reinforced material, combined with Mylar insulating sleeves, modified phenolic washers and ZPS washers. It maintains excellent electrical insulation, compression creep resistance and medium erosion resistance under 5000 psi high pressure. This product is essentially a high-performance Phenolic insulation Gasket Set, and its Type D structure ensures precise installation positioning, eliminates short-circuit risks, and is suitable for onshore and offshore wellhead equipment. Customization in dimensions, materials and insulation performance is supported, with single-piece minimum order quantity and flexible delivery lead time (7–35 days), making it a cost-effective alternative to imported brands. Priced at 199–249 USD, it balances performance and cost advantages.
Product Positioning and Applicable Scenarios
In wellhead devices, Christmas trees and high-pressure pipeline connections, electrochemical corrosion between flanges and stray current leakage are common causes of equipment failure. The 8-inch 5000 psi Type D insulation gasket set launched by Xiamen Qishine Industry Co., Ltd. is designed specifically for API 6A flanges. Through physical isolation and insulation blocking, it effectively protects flange faces and bolt connection systems, extending equipment service life. This Phenolic insulation Gasket Set is particularly suitable for severe onshore and offshore operating conditions, and its combined insulation structure can significantly reduce the risk of stray current between flanges.
In wellhead devices, Christmas trees and high-pressure pipeline connections, electrochemical corrosion between flanges and stray current leakage are common causes of equipment failure. The 8-inch 5000 psi Type D insulation gasket set launched by Xiamen Qishine Industry Co., Ltd. is designed specifically for API 6A flanges. Through physical isolation and insulation blocking, it effectively protects flange faces and bolt connection systems, extending equipment service life. This Phenolic insulation Gasket Set is particularly suitable for severe onshore and offshore operating conditions, and its combined insulation structure can significantly reduce the risk of stray current between flanges.
This batch of products has passed the EN 10204 3.1 material inspection, and the mechanical and electrical performance data can be traced back to destructive sample testing from the production batch, rather than relying solely on material mill test certificates, providing customers with a reliable quality assurance. Each set of Phenolic insulation Gasket Set comes with traceable batch inspection records, ensuring that material performance is authentic and trustworthy.
Core Components and Material Selection Logic
This set adopts a four-component integrated structure, each performing its own function:
- Retainer (Gasket Body): Made of phenolic glass fiber reinforced material (Phenolic, RX50), featuring both high rigidity (compressive strength 25,000 psi) and high electrical insulation (dielectric strength 500 V/mil). Under 5000 psi flange preload, it exhibits excellent creep resistance and maintains dimensional stability over long-term service. This retainer is the most critical insulating barrier layer within the entire Phenolic insulation Gasket Set.
This set adopts a four-component integrated structure, each performing its own function:
- Retainer (Gasket Body): Made of phenolic glass fiber reinforced material (Phenolic, RX50), featuring both high rigidity (compressive strength 25,000 psi) and high electrical insulation (dielectric strength 500 V/mil). Under 5000 psi flange preload, it exhibits excellent creep resistance and maintains dimensional stability over long-term service. This retainer is the most critical insulating barrier layer within the entire Phenolic insulation Gasket Set.
- Insulating Sleeve: Made of Mylar polyester sleeve, wrapping the bolt shank to prevent metal-to-metal contact between the bolt and the flange hole wall. Its dielectric strength also reaches 500 V/mil, and its water absorption rate is only 0.8%, maintaining stable insulation resistance in humid environments. This sleeve, together with the retainer, forms the dual insulation defense line of the Phenolic insulation Gasket Set.
- Insulating Washer: Also made of phenolic material, placed under the nut to form a double-sided insulation barrier. This washer further enhances the electrical isolation effect of the entire Phenolic insulation Gasket Set in the fastening area.
- Zinc-Plated Steel Washer (ZPS): Manufactured from medium carbon steel (CS), with measured yield strength 410 N/mm², tensile strength 647 N/mm², and hardness 75.7 HRB, providing sufficient bearing surface hardness to prevent the phenolic washer from being crushed or embedded into the nut surface during tightening. The addition of the steel washer allows the entire Phenolic insulation Gasket Set to achieve an optimal balance between mechanical load-bearing and electrical insulation.
Quality Control and Delivery Assurance
Products will undergo item-by-item inspection by the Xiamen Qishine quality control department to ensure qualified product quality, and will be stamped with the inspection special seal. Each set of products can be supplied with material certificates upon shipment, meeting the rigid requirements of international engineering companies for material traceability. We implement strict factory inspection procedures for each batch of Phenolic insulation Gasket Set, ensuring that both electrical and mechanical indicators meet standards simultaneously.
Products will undergo item-by-item inspection by the Xiamen Qishine quality control department to ensure qualified product quality, and will be stamped with the inspection special seal. Each set of products can be supplied with material certificates upon shipment, meeting the rigid requirements of international engineering companies for material traceability. We implement strict factory inspection procedures for each batch of Phenolic insulation Gasket Set, ensuring that both electrical and mechanical indicators meet standards simultaneously.
The delivery lead time is 7–35 days, with support for single-piece minimum order quantity and customized dimensional modifications. For replacing corresponding specifications of imported brands (such as TP, Garlock), this product achieves direct interchangeability in electrical performance and mechanical strength, and offers more competitive pricing (199–249 USD/set). This Phenolic insulation Gasket Set was designed from the very beginning with direct replacement of imported models as the target, with fully compatible mounting dimensions and bolt hole spacing.
For API 6A flange connections in offshore platforms, onshore high-pressure gas wells and refining units that require reliable electrical insulation, the Xiamen Phenolic Insulation Gasket Set provides a preferred solution with verifiable performance, traceable materials and acceptable cost. Choosing this Phenolic insulation Gasket Set means you obtain material traceability assurance certified under EN 10204 3.1 and stable on-site insulation performance. We recommend that customers cooperate with proper torque control procedures during installation and regularly test insulation resistance to maximize the service life of the gasket set.
For a copy of the MTC for this batch or customized solutions, please contact Xiamen Qishine sales representative, Bella (WhatsApp: +86 159 6025 9563).
Send Message
