Smooth PTFE Outside Braided Tubing

BESTYIELD Technology (Huizhou) Co., Ltd. is one of the leading manufacturers and suppliers of smooth ptfe outside braided tubing in China, also supports customized service. Welcome to wholesale bulk smooth ptfe outside braided tubing in stock here and get pricelist from our factory. For price consultation, contact us.

 

The PTFE 902 series combines the unmatched chemical inertness of virgin PTFE with the mechanical strength of stainless steel wire braid, creating a high-pressure hose platform for the most chemically aggressive and contamination-sensitive applications. Key features include:

• Tube: PTFE (Polytetrafluoroethylene) - virtually universal chemical resistance with zero extractables for ultra-pure fluid paths
• Color: Natural or multiple colors - natural PTFE for purity-critical applications; color-coded options for system identification
• Outside braid: Polyester or stainless steel - 304/316L stainless steel braid provides hoop-stress containment up to 5 MPa working pressure
• Temperature range: -150°C to +250°C - the widest operating temperature range in our product portfolio
• Compliance standards: RoHS, REACH - compliant with European environmental regulations
• Flame resistance rating: HB, V1, V2 - self-extinguishing and limited-burn classifications for industrial environments

 

The 902 series combines the chemical inertness of virgin PTFE with the mechanical strength of stainless steel wire braid, delivering working pressures up to 5 MPa - an order of magnitude higher than unbraided PTFE tubing. PTFE's extraordinary chemical resistance stems from the carbon-fluorine bond, one of the strongest in organic chemistry, which creates a molecular shield that repels virtually all reactive substances.

Unlike rubber or thermoplastic hoses, PTFE does not swell, degrade or leach when exposed to concentrated acids, organic solvents, or ultra-pure water. The stainless steel braid (304 or 316L upon request) provides hoop-stress containment while maintaining full flexibility.

This series is the standard choice in semiconductor fabrication and pharmaceutical processing, where both contamination-free fluid paths and high-pressure chemical delivery coexist in the same system.

The PTFE tube is manufactured using a extrusion process, where fine-powder PTFE resin is extruded through a mandrel die, and then sintered at 380°C to achieve full molecular consolidation. This process yields a smooth-bore tube with minimal internal porosity and consistent wall thickness.

The stainless steel braid is applied over the PTFE tube using a circular braiding machine with precision tension control, achieving a braid angle of 52±2° that optimizes the balance between pressure containment and flexural rigidity. Each braid carrier holds 7-12 wires depending on hose size, with wire diameter carefully selected to provide adequate coverage without excessive stiffness.

 

In semiconductor fabrication, the 902 series handles aggressive wet-etch chemistries (HF, HNO3, H2SO4 mixtures) at elevated pressures in bulk chemical delivery systems. The PTFE liner ensures zero metallic contamination, critical for sub-10nm process nodes.

Pharmaceutical manufacturers rely on 902 series hoses for WFI (Water for Injection) transfer, CIP chemical circulation, and clean steam supply lines that must withstand SIP sterilization at 140°C.

Chemical plants specify these hoses for metering pump discharge lines carrying catalysts, initiators, and solvent blends at pressures exceeding 10 MPa. The stainless steel braid also provides EMI shielding for instrumentation signal cables in high-noise industrial environments.

Beyond these primary sectors, the 902 series serves niche applications in aerospace fuel systems where PTFE's low coefficient of friction minimizes pressure drop, and in analytical laboratory instruments where extractable-free fluid paths are essential for reproducible chromatography results. The 316L stainless steel braid variant is specifically recommended for pharmaceutical and food processing applications where chloride-containing cleaning agents (sodium hypochlorite, peracetic acid) would cause pitting corrosion in standard 304 braid.

 

Part Number	Hose I.D.		Hose O.D.		Working Pressure		Burst Pressure		MIN. Bend Radius
	inch	mm	inch	mm	psi	MPa	psi	MPa	inch	mm
902-01	3/16	4	0.28	7	2755	19.0	8265	57.0	1-9/16	40
902-02	1/4	6	0.35	9	2610	18.0	7830	54.0	2-1/2	63
902-03	5/16	8	0.43	11	2320	16.0	6960	48.0	3-1/16	77
902-04	3/8	10	0.51	13	2030	14.0	6090	42.0	3-9/16	91
902-05	1/2	12	0.59	15	1740	12.0	5220	36.0	4-1/8	105
902-06	9/16	14	0.67	17	1450	10.0	4350	30.0	4-11/16	119
902-07	5/8	16	0.79	20	1160	8.0	3480	24.0	5-1/2	140
902-08	3/4	19	0.91	23	1015	7.0	3045	21.0	6-5/16	161
902-09	1	25	1.18	30	870	6.0	2610	18.0	8-1/4	210

 

• Remarks: Inner and outer diameter sizes are customizable.

 

Selecting the optimal fluoropolymer tube material requires balancing chemical resistance, temperature capability, pressure rating, and cost. PTFE offers the widest temperature range (-150°C to +250°C) and the highest pressure capability when paired with stainless steel braid, making it the first choice for general high-pressure chemical service. However, PTFE is opaque, which prevents visual flow inspection, and its high melt viscosity makes extrusion more complex and costly than other fluoropolymers.

FEP (Fluorinated Ethylene Propylene) provides transparency that allows visual monitoring of fluid flow and bubble detection - a significant advantage in low-pressure laboratory and analytical applications. However, FEP is limited to 200°C continuous service and lower pressure ratings due to its lower tensile strength. PFA (Perfluoroalkoxy) combines the transparency of FEP with a 260°C temperature capability that matches or exceeds PTFE, but at a premium material cost of approximately 2-3× that of PTFE. We recommend PTFE for general high-pressure chemical service, FEP for low-pressure visual monitoring needs where temperature does not exceed 200°C, and PFA for ultra-pure high-temperature applications such as semiconductor wet process tools where both transparency and 260°C capability are required.

 

PTFE is inherently cleanroom-compatible due to its non-particle-shedding surface characteristics. The 902 series meets Class 100 (ISO 5) cleanroom requirements for particulate contamination, making it suitable for direct installation in semiconductor fabrication cleanrooms. Extractable ion testing confirms levels below detection limits per SEMI F57, the semiconductor industry standard for high-purity fluid handling components.

For pharmaceutical customers, end-user specifications often require ASTM D7893 compliance for PFA-equivalent purity levels in PTFE-lined systems. The 902 series is available with hose assembly performed in an ISO 7 cleanroom environment upon request, with full documentation of particulate and molecular contamination controls. As a value-added service, we offer pre-cleaning with 18MΩ deionized water followed by nitrogen drying, verified by total organic carbon (TOC) analysis below 50 ppb. Each cleanroom-assembled hose is double-bagged in cleanroom-grade polyethylene and shipped with a certificate of conformance documenting the cleaning protocol and test results.

 

 

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