PTFE-lined corrugated metal hose

Product Introduction

PTFE-lined metal hose  
PTFE-lined metal hoses are high‑end pipeline fittings specially engineered for highly corrosive, ultra‑clean service conditions. They combine the flexibility of metal hoses with the exceptional corrosion resistance of PTFE, effectively addressing the industry’s longstanding challenges of conventional metal hoses—namely, their susceptibility to erosion and leakage when exposed to aggressive media. With decades of expertise in the field, Hebei Jiuxing Rubber & Plastics Products Co., Ltd. offers custom‑manufactured PTFE‑lined metal hoses that adhere rigorously to international chemical‑industry standards, meeting the demanding transport requirements of diverse applications. Below, we provide a detailed analysis across key dimensions—including material, construction, dimensions, applications, and operating ranges—to help you make informed selections and achieve efficient, reliable performance.  
Core material: Enhanced with a dual-material construction, balancing corrosion resistance and pressure-bearing capacity.  
PTFE-lined metal hoses feature a dual‑layer structure—metal on the exterior and PTFE on the interior. This scientifically engineered combination delivers the high strength and vibration resistance of metal, while providing PTFE’s exceptional corrosion resistance. All materials are rigorously tested by accredited authorities, ensuring compatibility with demanding operating conditions and eliminating the risk of media‑induced corrosion and leakage.  
1. Inner layer: PTFE lining  
▫️ Material Properties: Made from food-grade, industrial‑grade, high‑purity PTFE (purity ≥ 99.95%), commonly known as the “King of Plastics,” this material exhibits exceptional chemical resistance, effectively withstanding aggressive media such as concentrated hydrochloric acid, sulfuric acid, nitric acid, strong alkalis, and powerful solvents like acetone and methanol. It releases no harmful substances and complies with both food‑grade (FDA) and pharmaceutical‑grade standards. Its inner surface is smooth with no dead corners, featuring an extremely low coefficient of friction (≤ 0.04), minimizing adhesion and scale formation, facilitating easy cleaning, and making it ideal for handling highly clean, crystallizable fluids.  
▫️ Key specifications: Temperature resistance range: −200°C to 260°C; long-term service temperature: ≤200°C; compressive strength: ≥20 MPa; tensile strength: ≥25 MPa; liner thickness: 0.5 mm to 2.0 mm (customizable based on operating conditions); free of bubbles and pinholes; excellent aging resistance; outdoor service life: ≥8 years; resistant to embrittlement and cracking.  
2. Outer layer: metallic hose base material  
▫️ Mainstream materials: Premium 304 and 316L stainless steel (with optional specialty alloy options), seamlessly bonded with an inner PTFE lining, and encased in a high‑density stainless steel braided mesh to enhance the hose’s overall pressure resistance and blast‑proof performance, preventing deformation and damage. The 316L stainless steel version further improves resistance to chloride‑ion corrosion, making it ideal for coastal environments, high‑salt‑mist conditions, and other harsh, highly corrosive settings.  
▫️ Material Advantages: The metal substrate boasts a tensile strength exceeding 520 MPa, excellent flexibility, and the ability to accommodate multidirectional displacement. It offers superior resistance to vibration and impact, effectively absorbing stresses caused by thermal expansion and contraction in piping systems, thereby preventing damage to the liner from external forces. Additionally, it provides structural support and protects the liner, balancing safety with practicality.  
3. Joint Material  
The fittings are made of the same material as the outer‑layer metal hose (304/316L stainless steel) and are manufactured using laser welding, resulting in smooth, robust welds with a leak rate kept below 1×10⁻⁹ Pa·m³/s, thereby preventing corrosion and leakage caused by material mismatches. The inner wall of the fitting seamlessly interfaces with the PTFE liner, eliminating steps and dead zones to prevent media retention and ensure smooth fluid flow.  
Product Structure: Scientifically designed to meet complex installation and conveying requirements.  
PTFE-lined metal hoses feature an integrated four‑layer structure—PTFE lining, stainless steel corrugated tube, stainless steel braided mesh, and fittings—balancing corrosion resistance, flexibility, and pressure resistance. With a compact, well‑designed configuration, they are well suited to complex installation environments while effectively preventing media permeation and liner delamination. Key structural details are as follows:  
1. Core Structure Decomposition  
Inner layer: PTFE liner, integrally molded with no seams, tightly bonded to the outer corrugated tube to prevent media penetration into the metal layer and thereby avoid corrosion.  
Middle layer: stainless steel bellows, manufactured using a precision cold-rolling process with a forming accuracy of ±0.05 mm, capable of compensating for axial, lateral, and angular displacements (axial compensation up to 50 mm, lateral displacement up to 30 mm, and angular deflection up to ±15°), while absorbing equipment vibrations and thermal expansion–contraction stresses in piping systems.  
Outer layer: High‑density stainless steel braided mesh with a braid density of ≥98%, enhancing the hose’s resistance to compression and explosion, preventing corrugation deformation, and providing wear‑resistant, scratch‑proof protection.  
Fittings: Integrally welded to the metal hose and seamlessly connected to the PTFE liner; available in customizable configurations to suit various installation scenarios, with no risk of leakage.  
2. Structural Advantages  
▫️ Leak-free design: The PTFE liner is integrally molded, with the fittings seamlessly joined to the liner, effectively preventing media penetration and leakage, making it suitable for conveying highly corrosive and volatile media.  
▫️ High flexibility: Can be freely bent and deflected, accommodating the complex installation layouts of chemical plants without requiring additional adjustments to pipe routing, ensuring convenient installation.  
▫️ Excellent resistance to damage: Dual protection—outer braided mesh and a metal corrugated sleeve—effectively prevents the inner liner from being damaged by external forces or pressure impacts, thereby extending its service life.  
▫️ Easy to Clean: The PTFE-lined interior features a smooth surface with no dead angles and no scale buildup, allowing for quick cleaning via high-pressure or chemical methods, making it ideal for high‑cleanliness applications.  
Dimensions and Specifications: Full range of sizes covered, with support for customization.  
Jiuxing rubber‑plastic PTFE‑lined metal flexible hoses are available in a full range of sizes and can be custom‑designed to meet specific operating conditions. Options include diameter, length, lining thickness, and fitting specifications, ensuring compatibility with various fluid flow rates and installation space requirements. The key standard dimensions are as follows; all dimensions comply with GB/T and ISO international standards:  
1. Core Dimension Parameters  
Caliber specifications: DN4 to DN600 (￠4 mm to ￠600 mm), covering both small‑diameter precision conveying and large‑diameter bulk conveying, and adaptable to varying flow‑rate requirements.  
Liner thickness: 0.5 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.5 mm, 2.0 mm; the more corrosive the medium, the thicker the liner that can be selected.  
Length specifications: 0.5 m to 10 m (standard length); longer lengths can be custom‑made (up to 50 m); supports segmented connections and is adaptable to various installation spaces.  
Pressure range: 0.6 MPa to 40 MPa, adjustable based on nominal diameter and liner thickness; standard operating conditions are compatible with 1.6 MPa to 10 MPa, while high-pressure applications can be customized with an enhanced version.  
Connection types: threaded connections (NPT, PT, G, metric threads), flanged connections (GB, ANSI, DIN standards), and quick‑connect fittings; custom options available to match equipment interfaces.  
2. Customized Dimension Specifications  
We can customize products to meet specific customer operating conditions, offering special diameters (such as DN650 and DN800), custom lengths, and tailored liner thicknesses. We also provide customizable plastic‑coated outer layers (PVC, PE, or PU) to enhance wear resistance and electrical insulation, making them suitable for outdoor applications and ground‑level installations. We can deliver a customized dimensioning proposal within 48 hours and complete sample delivery within 7 days.  
Core applications: Focused on severe corrosion resistance and ultra-high cleanliness, serving multiple industries.  
PTFE-lined metal hoses are ideally suited for handling highly corrosive, ultra‑clean, easily crystallizing, and volatile process fluids. With their outstanding corrosion resistance and superior cleanliness, they are widely employed across industries such as chemical processing, pharmaceuticals and food, fine chemicals, and electroplating and electronics, precisely addressing the demanding operating conditions that conventional hoses cannot meet.  
1. Industrial Chemical Sector (Core Applications)  
Compatible media: concentrated hydrochloric acid, sulfuric acid, nitric acid, sodium hydroxide, potassium hydroxide and other strong acidic and alkaline solutions; acetone, methanol, ethanol and other strong solvents; chemical wastewater, corrosive slurries, chlorine‑containing media, etc.  
Application scenarios: inlet and outlet connections for chemical reactors, pump‑valve interfaces, pipelines conveying corrosive media, and pipeline expansion‑joint compensation. Particularly suited for highly corrosive environments such as fine chemicals, agrochemicals, and coal‑chemical processes, it effectively prevents leaks and production shutdowns caused by media‑induced pipe corrosion.  
2. Electroplating & Electronics Field  
Compatible media: electroplating solutions, electrolytes, chromium‑containing solutions, nickel‑containing solutions, and other highly corrosive media;  
Application scenarios: pipelines in electroplating production lines, cleaning pipelines for electronic components, and media‑transport systems for precision electronic equipment—preventing electroplating solutions from corroding the piping, avoiding contamination of the plating bath, and ensuring the quality of electroplating and electronic products.  
3. Other High-End Sectors  
It is suitable for high-end applications such as nuclear power, chemical processing, aerospace, and laboratory settings, used for conveying highly corrosive and ultra‑clean media, as well as for piping connections in precision instruments and specialized equipment. It can withstand extreme temperature and pressure conditions, ensuring safe and stable fluid transport.  
Scope of application: Clearly define operating condition boundaries for precise matching and enhanced durability.  
The performance of PTFE‑lined metal hoses is directly dependent on how well they match the operating conditions. The following outlines their applicable ranges and prohibited applications to help you select the right product, extend its service life, and mitigate potential risks:  
1. Applicable Operating Conditions Range  
Temperature range: -200°C to 260°C. For long-term use, it is recommended to keep the temperature between -50°C and 200°C to prevent liner embrittlement or damage caused by exceeding this range.  
Pressure range: 0.6 MPa to 40 MPa; select according to pipe diameter and liner thickness to prevent overpressure that could cause the pipe to rupture.  
Medium compatibility: Suitable for virtually all chemical media—including strong acids and bases, strong solvents, and chlorine‑containing media—and can also handle high‑purity, easily crystallizing, and highly volatile media.  
Installation scope: chemical processing workshops, electroplating facilities, laboratories, and similar environments. Suitable for equipment connections, pipeline compensation, and media conveyance; adaptable to both indoor and outdoor settings (with appropriate protective measures); capable of withstanding minor vibrations and displacements.  
2. Prohibited Use Cases  
Do not use under prolonged conditions of excessive temperature (>260°C) or excessive pressure to prevent the PTFE lining from melting and decomposing, which could lead to pipeline leakage.  
Do not use in applications involving severe abrasion or impact (e.g., direct contact with sharp objects or being run over by heavy equipment); avoid damage to the outer woven mesh and inner lining.  
Do not use in high-temperature media containing fluoride ions (such as hydrogen fluoride gas) to prevent aging and damage to the PTFE lining.  
Do not bend or pull the hose arbitrarily to prevent the liner from detaching and the fittings from cracking; the bending radius must be at least eight times the outer diameter of the hose.  
Core Advantages of Jiuxing Rubber and Plastic Products  
As one of the world’s top ten hydraulic hose manufacturers, Jiuxing Rubber & Plastics focuses on the R&D and production of high‑end, corrosion‑resistant hoses, including a series of PTFE‑lined metal hoses. With premium materials, precision manufacturing, and customized services, the company has set an industry benchmark. Its core strengths help customers reduce costs, improve efficiency, and ensure operational safety.  
✅ Quality Assurance: Certified to multiple international standards, including API ISO 9001 and API Spec Q1; PTFE lining purity ≥ 99.95%; metal substrates verified by spectral analysis; a seven‑step inspection process covering the entire production cycle (including liner air tightness, joint weld strength, and overall pressure resistance); finished‑product rework rate below 0.3%; and fatigue life exceeding 100,000 cycles.  
✅ Customized Services: We can tailor dimensions, materials, connection types, and liner thicknesses to meet your specific operating conditions. We provide a selection proposal within 48 hours, deliver samples in 7 days, and commence mass production within 2 weeks, ensuring optimal performance for even the most demanding, customized applications.  
✅ Corrosion‑Resistant and Durable: The PTFE lining is resistant to nearly all chemical media, while the outer stainless‑steel braided mesh and corrugated tube provide dual protection, extending service life by more than five times compared with standard lined hoses and reducing replacement and maintenance costs.  
✅ All‑scenario compatibility: From standard highly corrosive environments to high‑end cleanroom applications, we comprehensively meet the needs of multiple industries, offering pre‑sales product selection guidance, in‑sales installation consulting, and after‑sales maintenance support, with rapid response worldwide.  
Selection Guide  
Key considerations in selection: Based on the medium’s corrosivity, operating temperature, working pressure, flow rate, and installation space, precisely match the material, dimensions, and liner thickness to prevent product failure caused by improper selection.  
1. When the medium is a common strong acid or alkali (such as dilute hydrochloric acid or sodium hydroxide), select a 304 stainless steel outer shell with a 1.0 mm to 1.2 mm PTFE liner.  
2. For media that are highly acidic or alkaline, or contain chlorine (such as concentrated sulfuric acid or seawater), select a 316L stainless steel outer shell with a 1.5 mm to 2.0 mm PTFE liner.  
3. High‑cleanliness applications (pharmaceuticals, food) → Select a food‑grade PTFE liner with a 316L stainless steel outer layer, and apply a polished inner surface finish.  
4. High-pressure operating conditions (>10 MPa) → Thickened outer braided mesh, increased liner thickness, and custom high-pressure reinforced version;  
5. Outdoor and floor applications → Customized plastic‑coated outer layer to enhance wear resistance, electrical insulation, and water resistance.  
Hebei Jiuxing Rubber and Plastic Products Co., Ltd. leverages its expert technology, reliable quality, and attentive service to provide you with a one-stop solution for PTFE-lined metal hoses. For custom products or assistance with product selection, please contact us at any time—helping your operations run efficiently, safely, and reliably.

Factory workshop

Jiuxing Rubber & Plastic is a 100% manufacturing enterprise specializing in hydraulic hoses and industrial hoses, covering all fields including oil and gas, agriculture, transportation, construction, mining and forestry.

Laboratory

Our factory has introduced a complete set of laboratory testing equipment. We possess advanced laboratory capabilities and can conduct product quality inspections and research and development work to ensure stable and excellent product quality.

After purchasing raw materials, we will test each batch to ensure it meets the technical requirements of our products.

After production is completed, we will test each hose, including its working pressure and burst pressure, and conduct pulse tests for each order to ensure 100% qualification of the factory-finished products.

We strive to provide customers with top-quality hoses and do everything possible to ensure their quality.

Product packaging and transportation

I. Order Confirmation  

After the order is placed, the customer service and the business team will immediately verify the product specifications, quantity, delivery date, and special requirements.   
After production is completed, a full inspection will be conducted to ensure that the size, performance, and appearance meet the standards. Only after passing the inspection can it proceed to the packaging stage.  

II. Professional Packaging  

According to the customer's requirements, the hydraulic hoses will be packed in cardboard boxes or wooden boxes.   
After the hoses are produced, we will pack them.   
Usually, woven bags and plastic films are used for packaging.   
Special packaging can be provided according to the customer's requirements. Special packaging is the requirement of the Edible ACC Ording customers.  

III. Loading and Transportation 

The professional loading and unloading team will operate in a standardized manner, load and unload gently, and stack reasonably to ensure the stability of the goods.   
Support domestic full truckload/less-than-truckload logistics, international sea freight, air freight, express delivery and designated freight forwarder transportation.   
The entire process is securely fixed to avoid squeezing， collision， and tipping， suitable for long-distance transportation.

IV. Tracking & Delivery - Goods Tracking and Delivery

After shipment, provide the full set of documents including the logistics tracking number / bill of lading / packing list, invoice, etc.   
Real-time follow-up of the logistics status, timely synchronization with the customer to ensure safe and punctual delivery.   
Support various trade terms such as FOB, CIF, CFR, etc., and provide a worry-free connection throughout the process.  

V. Payment Method:  

Order ≤ $10,000: 100% wire transfer for advance payment   
Order > $10,000: 30% wire transfer for advance payment, and settle the balance payment before shipment   
Support wire transfer (T/T) and letter of credit (L/C)