1. Product Description Industry woven mesh is a precision-engineered metal mesh produced by interlacing warp and weft wires on high-speed looms. Bolin supplies woven mesh in a comprehensive range of materials — from standard stainless steel to exotic super-alloys — across all weaving patterns and mesh counts from 1 to 635 mesh. This is the company’s core and flagship product line, serving global filtration, separation, screening, and architectural applications. 2. Production Process Every roll of Bolin woven wire mesh passes through a strictly controlled seven-step production process, ensuring dimensional accuracy, surface quality, and consistent filtration performance. Fig. 1 — 7-Step Production Process: Wire → Warping → Heading & Reeding → Weaving → Flattening → Mesh Inspection → Cleaning.

Step	Stage	Description
1	Raw Wire (Material)	High-quality metal wire (stainless steel, nickel, titanium, copper, etc.) selected and verified to specification
2	Wire Warping	Wire is precision-wound onto weaving beams to achieve uniform tension across the full width
3	Heading & Reeding	Warp wires are threaded through heddles and reed; determines mesh count and weave pattern
4	Weaving	Weft wires interlaced with warp on high-speed looms; weave pattern set to customer specification
5	Flattening	Woven mesh passed through flatting rolls to ensure a perfectly flat, uniform surface
6	Mesh Inspection	Aperture size, mesh count, and surface integrity measured and verified by dedicated inspection equipment
7	Cleaning	Mesh cleaned to remove oils, debris, and surface contaminants; ready for cutting, rolling, and shipment

3. Quality Control Process Bolin operates a comprehensive 8-stage quality control protocol covering incoming raw material through to pre-shipment inspection, ensuring every delivered product meets the stated specification.

Stage	QC Step	Control Method / Standard
1	Raw Material Inspection	Verify wire grade, certificate of conformance, tensile strength, and surface condition on arrival
2	Wire Diameter Verification	Measure wire diameter (µm-level precision) against specification before warping
3	In-Process Weaving Inspection	Monitor mesh count, wire tension, and weave pattern during production at regular intervals
4	Aperture & Mesh Count Measurement	Dedicated mesh inspection station: optical inspection of aperture size, uniformity, and mesh count
5	Tensile & Elongation Test	Sample testing for breaking load and elongation to confirm mechanical property compliance
6	Surface Cleaning & Visual Inspection	Machine-cleaned, then visually inspected under light for weaving defects, contamination, or damage
7	Dimensional & Weight Check	Final measurement of roll width, length, and weight against order specification
8	Packing & Shipping Inspection	Pre-shipment check of quantity, labelling, roll packaging, and shipping documentation

4. Available Materials

Grade	Key Characteristics	Typical Application
304 / 304L	General-purpose corrosion resistance, excellent formability	Food processing, architecture, general industrial
316 / 316L	Molybdenum-enhanced, superior chloride & seawater resistance	Chemical, oil & gas, marine engineering
317 / 317L	Higher molybdenum content, stronger acid resistance	Chemical processing, flue-gas desulfurisation
904 / 904L	Super austenitic, resists sulfuric acid & chlorides	Oil refining, chemical processing
2205 (S31803)	Duplex: high strength + excellent corrosion resistance	Oil & gas, seawater, NACE environments
2507 (S32750)	Super duplex: extreme strength & corrosion resistance	Deep-sea oil & gas, marine engineering
310 / 310S / 314	High Cr+Ni, oxidation-resistant to 1100°C	Furnaces, heat treatment, high-temp filtration
Nickel Alloys (Monel / Inconel / Hastelloy)	Outstanding in reducing media, caustic alkalis, extreme heat	Chemical, aerospace, nuclear
Copper / Brass / Phosphor Bronze	Conductive, antimicrobial, seawater-resistant	EMI shielding, batteries, marine filtration
Titanium	Lightweight, resists seawater & strong oxidising media	Chemical, seawater desalination, electroplating
Silver	High conductivity, antibacterial	Battery electrodes, medical devices
FeCrAl	Oxidation-resistant to 1400°C	Combustion, heating elements, high-temp filtration
Tungsten / Molybdenum	Ultrahigh melting point, extreme-temperature stability	High-temp furnaces, electronics, vacuum applications

5. Weaving Patterns Bolin manufactures all six major weaving configurations. The choice of weave directly determines filtration precision, mechanical strength, and pressure resistance. Fig. 2 — Six Weaving Patterns: Plain Weave / Twill Weave / Plain Dutch Weave / Twill Dutch Weave / Five-Heddle Weave / Reverse Dutch Weave

Weave Type	Structure & Mechanism	Best Application
Plain Weave	Each weft wire passes alternately over and under each warp wire; produces uniform square openings	General screening, sieving, architectural decoration
Twill Weave	Each weft passes over and under two warp wires; diagonal pattern allows heavier wire under same mesh count	Heavy-duty sifting, mining screens
Plain Dutch Weave (PDW)	Coarse warp + finer, closely-packed weft; no straight-through pores; absolute aperture 5–300 µm	High-pressure liquid/gas filtration, edible oil refining
Twill Dutch Weave	Combines twill and Dutch weaving; finest filtration (1–5 µm) and superior mechanical stability	Precision chemical, fuel, and pharmaceutical filtration
Five-Heddle Weave	Five-shaft pattern; high wire contact area, very high strength and filtration uniformity	High-pressure industrial filtration
Reverse Dutch Weave	Fine warp + heavy weft; very high pressure resistance and backwash durability	Continuous polymer & plastic melt filtration
Crimped Weave	Wires pre-crimped before weaving; locked intersections, large openings, rigid structure	Mining vibrating screens, quarry grading, protective grilles

6. Key Features ● Outstanding corrosion, acid, alkali, and salt resistance — grade-dependent ● High-temperature stability: up to 1,400°C depending on material grade ● Precise, uniform aperture: filtration ratings from 1 mesh (23.37 mm) down to 635 mesh (20 µm) ● High tensile strength and wear resistance; suitable for high-pressure backwashing ● Smooth, hygienic surface — easy to clean, sterilise, and validate ● Custom widths available, including super-wide cloth (up to 4 m+) ● Full traceability: material certificates (Mill TC), inspection reports available on request 7. Applications ● Petroleum, chemical, and pharmaceutical filtration and separation ● Food & beverage sifting: flour, sugar, starch, and liquid filtration ● Mining and quarrying: vibrating screen decks, ore grading ● Water treatment and environmental protection ● Mechanical engineering, aerospace, and vacuum technology ● EMI / RFI shielding and anti-radiation screening ● Architecture and interior design: facades, room dividers, security screens 8. Specifications 8.1 Plain / Twill Weave — Standard Square Mesh Series

Mesh Count	Wire Dia. (mm)	Aperture (mm)	Open Area (%)	Filtration (µm)
1	2.03	23.37	84.6	23,370
2	1.60	11.10	76.4	11,100
4	1.20	5.15	65.8	5,150
6	0.90	3.33	62.0	3,330
8	0.71	2.46	60.2	2,460
10	0.50	2.04	64.5	2,040
12	0.45	1.66	62.7	1,660
16	0.35	1.23	60.7	1,230
20	0.40	0.87	46.9	870
30	0.25	0.59	49.7	590
40	0.25	0.385	36.8	385
50	0.20	0.308	36.8	308
60	0.15	0.273	41.7	273
80	0.12	0.198	38.8	198
100	0.10	0.154	36.8	154
120	0.08	0.132	38.8	132
150	0.06	0.109	41.6	109
200	0.05	0.077	36.8	77
250	0.045	0.057	31.2	57
300	0.040	0.0447	27.9	44.7
325	0.035	0.043	30.5	43
400	0.030	0.0335	27.8	33.5
500	0.025	0.0258	25.8	25.8
635	0.020	0.020	25.0	20.0

8.2 Plain Dutch Weave (PDW) — Mesh Count & Specification Table Dutch weave mesh count is expressed as warp count × weft count (e.g. 40×200 means 40 warp wires and 200 weft wires per inch). The finer weft creates the filtration aperture.

Mesh (warp×weft)	Warp Wire Dia. (mm)	Weft Wire Dia. (mm)	Aperture (µm)	Typical Application
12 × 64	0.63	0.40	300	Coarse pre-filtration, large-particle screening
24 × 110	0.36	0.23	150	Industrial liquid filtration
30 × 150	0.28	0.19	100	Edible oil filtration, pre-coat filters
40 × 200	0.23	0.14	74	Chemical & pharmaceutical filtration
50 × 250	0.19	0.11	58	Precision liquid & gas filtration
80 × 700	0.14	0.065	25	High-precision filtration
100 × 900	0.10	0.056	17	Ultra-fine chemical & fuel filtration
150 × 1400	0.071	0.040	12	Pharmaceutical sterile filtration
200 × 1800	0.056	0.033	8	High-precision micro-filtration
325 × 2300	0.036	0.025	5	Ultra-fine filtration (minimum standard aperture)

Note: Twill Dutch Weave (TDW) provides even finer filtration than PDW at the same mesh count — typical TDW ratings extend from 1–5 µm for precision chemical and fuel filtration. All mesh counts and specifications above are industry-standard references; custom configurations available on request. Subject to factory confirmation. Supplier: Anping County Bolin Metal Wire Mesh Co., Ltd. | Ella@bolinwiremesh.com