Stainless Steel Cleanliness Pipe

Shuangsen manufactures and supplies Stainless Steel Cleanliness Pipe directly from China factory. Internal surface polished to Ra≤0.2µm – smooth, trace-free, and contamination-resistant. Supports electrolytic processing for enhanced surface passivation. Material grades: 304 and 316L. Designed for cleanroom environments, dust-free workshops, semiconductor support systems, and high-purity fluid conveyance where particulate control is critical. ISO 13485, 9001, 14001, 45001 certified.

Surface quality and particle control

Stainless Steel Cleanliness Pipe is manufactured with a focus on internal surface integrity. The mechanical polishing process achieves Ra≤0.2µm, producing a surface that is smooth and free of machining marks, scratches, or weld shadows. This level of finish minimizes particle entrapment and bacterial adhesion, making the tubing suitable for cleanroom applications where fluid purity must be maintained.

Electrolytic processing is supported as an additional surface treatment option. This electrochemical process removes surface impurities, reduces surface roughness further, and enhances the passive oxide layer. The combination of mechanical polishing and electrolytic treatment produces a surface that meets the cleanliness requirements of semiconductor support systems, pharmaceutical cleanrooms, and precision manufacturing environments.

Cleanliness and surface characteristics

• Internal mechanical polishing – Ra ≤ 0.2µm, smooth and trace-free
• Electrolytic processing supported – for enhanced surface passivation
• Contamination control – minimizes particle entrapment
• Corrosion resistance – passive layer maintained
• Material options – 304 and 316L
• Validation – air tightness test per batch

Dimensional range and availability

Standard OD range from 19.0mm (3/4") to 165.2mm (6½"). Wall thickness options from 0.89mm to 3.05mm. Custom dimensions available for specific installation requirements.

Tolerances follow JIS G3447 or ASTM A269/A270. Lengths typically -0/+10mm.

Quality verification and leak testing

Each batch of Stainless Steel Cleanliness Pipe is subject to the following inspection sequence:

• Air tightness test – verifies leak-free performance
• Internal surface inspection – visual and mechanical measurement of Ra value
• Dimensional verification – OD, wall thickness, and length
• Material verification – chemistry check per mill certificate
• Surface contamination check – particle count verification where specified

Traceability is maintained from coil heat number through forming, welding, and finishing. Factory test reports are issued per batch. Third-party inspection can be engaged at the production site.

Order specification checklist

1. Product designation
2. Material grade (304 or 316L)
3. Dimensions and tolerance class
4. Quantity (pieces or total length)
5. Packing method (bundles, crates, or custom)
6. Surface finish requirement (mechanical polish, electrolytic)
7. Testing method (air tightness, particle count)
8. Special marking or end protection

Cleanroom and dust-free applications

This tubing is specified for clean environments across multiple industries:

• Semiconductor manufacturing – support systems, fluid distribution
• Pharmaceutical production – cleanroom process lines, sterile fluid handling
• Precision electronics – dust-free workshop fluid conveyance
• Medical device manufacturing – clean assembly area services
• Biotechnology – high-purity fluid transfer
• Food and beverage – hygiene-critical fluid handling

Compliance standards and certifications

Certifications held: ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, ISO 13485:2016. National designations: "Specialized, Refined, Unique and New" Little Giant Enterprise and National High-Tech Enterprise.

Frequently asked operational questions

Can the Stainless Steel Cleanliness Pipe be produced to non-standard dimensions?
Yes. Custom production covers special OD, wall thickness, length, tighter tolerances, and specific surface finish requirements.

Is this a manufacturer or a trading operation?
Direct manufacturer. The facility operates 133 welded pipe lines and performs all key processes in-house.

Are samples available and what is the cost?
Samples are provided free of charge. The receiver covers freight. Lead time: 5–10 working days.

Can the factory be visited or inspected remotely?
On-site visits and online video walkthroughs are available. Real-time quality data can be shared.

What quality assurance procedures are in place?
Three inspection stages: incoming coil verification, in-process checks, and final inspection including air tightness testing, surface roughness measurement, and dimensional audit.

What is the typical delivery lead time?
Stock items: 3–10 days. Made-to-order: 25–45 days. Large orders: 50–60 days.

How is shipping arranged?
Long-term freight forwarders provide competitive rates. Delivery terms: FOB Ningbo/Shanghai, CIF, or EXW.

What surface finishes are available?
Internal mechanical polishing (Ra ≤ 0.2µm) is standard. Electrolytic processing is available for enhanced surface passivation.

Is full traceability maintained?
Each coil is assigned a unique heat number. Full traceability to raw material certificate is maintained.

What is the air tightness test pressure?
Air tightness testing is performed per batch to verify leak-free performance for cleanroom applications.

Why this tubing is selected for cleanroom and dust-free systems

• Internal polishing to Ra ≤ 0.2µm – smooth, trace-free surface
• Electrolytic processing supported – enhanced passivation
• Material grades 304 and 316L – corrosion resistance for clean environments
• Air tightness testing – verifies leak-free performance
• In-house quality control – reduces external dependency
• Non-standard sizes – no minimum batch restrictions
• Full documentation – supports audits and compliance
• Direct factory supply – consistent quality and pricing

Shuangsen Pipe Industry – National High-Tech Enterprise. Building a world-renowned Chinese pipeline brand. Every tube, from 19mm to 165mm OD, reflects 25 years of continuous process refinement and strict quality discipline.