Q1: What is the difference between SS304 and SS316 for pharmaceutical filtration?
SS304 is a general-purpose stainless steel with good corrosion resistance, suitable for dry food screening and less demanding industrial environments. SS316 contains molybdenum, which significantly improves resistance to chlorides and acidic process fluids — the conditions typically found in pharmaceutical manufacturing and wet food processing.
For pharmaceutical filtration, SS316 is the standard specification. If the mesh will be welded into a filter frame or housing, SS316L (low carbon grade) is preferred to prevent carbide precipitation at weld zones.
Q2: What mesh count should I use for pharmaceutical filtration?
Mesh count selection depends on the particle size you need to retain. Here is a practical reference:
| Application | Recommended Mesh Count | Aperture Size |
| Coarse pre-filtration | 80 – 100 mesh | 150 – 180 µm |
| General liquid filtration | 100 – 150 mesh | 105 – 150 µm |
| API powder screening | 200 – 250 mesh | 61 – 71 µm |
| Fine pharmaceutical screening | 325 mesh | 44 µm |
If you are unsure of your required mesh count, share your target particle size (in microns) and we will recommend the correct specification.
Q3: Plain weave, twill weave, or dutch weave — which is right for my application?
Plain weave is the standard choice for most pharmaceutical and food screening applications. It has uniform square apertures and is the easiest to clean, making it suitable for GMP environments
Twill weave is used where higher mechanical strength is needed at finer mesh counts. It allows finer wire diameters without sacrificing structural integrity — useful in high-pressure filter housings.
Dutch weave provides the finest particle retention at a given mesh count. The dense weft wire arrangement retains particles significantly smaller than the nominal aperture. It is commonly specified for pharmaceutical liquid filtration where very fine separation is required alongside high strength.
→ Not sure which weave type suits your application? Contact us and we will advise.
Q4: Does pharmaceutical-grade wire mesh need surface treatment?
Not always — it depends on the specific application and regulatory environment.
Mill finish (standard surface as produced) is acceptable for most industrial food processing and general pharmaceutical screening applications.
Electropolishing is recommended where the mesh is in direct contact with the drug product or food item. It removes surface micro-irregularities, reduces bacterial adhesion points, and significantly improves cleanability — making it the preferred finish for GMP-critical environments.
Passivation removes free iron from the stainless steel surface, enhancing corrosion resistance. It is often specified for pharmaceutical applications where material traceability and surface integrity are regulatory requirements.
We supply mesh in mill finish as standard. Electropolishing and passivation are available upon request — please specify your surface treatment requirement when enquiring.
Q5: Can stainless steel woven mesh withstand CIP and SIP cleaning cycles?
Yes. SS316 stainless steel woven wire mesh is fully compatible with:
•CIP (Clean-in-Place) — caustic soda, nitric acid, and peracetic acid cleaning solutions at elevated temperatures
•SIP (Sterilize-in-Place) — steam sterilization at standard autoclave temperatures (121–134°C)
•Ultrasonic cleaning — without dimensional change or wire displacement
This compatibility makes stainless steel woven mesh the preferred choice over synthetic filter media in GMP pharmaceutical environments where cross-contamination prevention and repeatability of cleaning validation are critical.
Q6: Do you provide material certification for pharmaceutical applications?
Yes. We provide mill test certificates (MTC) confirming the chemical composition and mechanical properties of the wire used in production. This documentation supports material traceability requirements in regulated pharmaceutical manufacturing environments.
Third-party inspection certificates are available upon request. Please specify your documentation requirements when placing your order.
Q7: Can you supply custom dimensions for filter discs and panels?
Yes. Most pharmaceutical filtration applications require custom dimensions rather than standard roll sizes. We supply:
•Custom roll width and length
•Cut-to-size sheets for filter disc blanking
•Specific wire diameter and aperture combinations outside standard tables
There is no additional charge for custom width specifications on roll orders. Cut-to-size sheet orders are quoted based on dimensions and quantity.
MOQ: 3 roll (standard rolls) or by negotiation for cut sheets
Q8: What is the lead time for custom specification mesh?
For custom specification orders — including non-standard mesh counts, wire diameters, or roll widths — our standard lead time is 3–7 business days from order confirmation.
For urgent requirements, please contact us directly via WhatsApp and we will advise on available stock and expedited production options.
Q9: How do I specify my requirements to get an accurate quote?
To prepare an accurate quotation quickly, please provide the following information:
①Mesh count or target aperture size (in mesh per inch or microns)
②Material grade (SS316 recommended for pharmaceutical applications)
③Weave type (plain / twill / dutch — if known)
④Roll width and length, or sheet dimensions if cut-to-size
⑤Quantity (number of rolls or sheets)
⑥Surface treatment requirement (mill finish / electropolished / passivated)
⑦Certification requirements (MTC, third-party inspection, etc.)
If you are unsure of any of the above, share your application details and we will recommend the correct specification.
→ Send Enquiry | WhatsApp: +86-13932878588 | Email: sales7@hbtuojiang.cn
Q10: Why source pharmaceutical filtration mesh from Tuojiang?
•20+ years of woven wire mesh manufacturing experience
•ISO 9001 certified production facility
•Located in Anping County, Hebei — the world's largest wire mesh manufacturing base
•SS316 and SS316L mesh available in custom specifications
•Surface treatment options including electropolishing and passivation
•Full material traceability documentation (MTC) available
•MOQ 5 roll — flexible for project procurement across multiple specifications
•Custom orders shipped in 3–7 business days
•Serving pharmaceutical and food processing customers in the US, EU, Middle East, and Australia
