Material acceptance criteria for ultra-clean workbench (covering the countertop, cabinet, glass, and accessories)
\nThe inspection process is divided into three parts: visual inspection and hand feel self-check, test for reagent corrosion, and verification of certificate materials. This is applicable for both laboratory and GMP inspections and can be directly used for product inspection.
\n1. Core material standards for partitions
\n1.1 Operating countertop (most critical, directly in contact with acids, alkalis, alcohol, and 84 disinfectant)
\nAcceptable mainstream: SUS304 stainless steel; for strong corrosive environments (acid washing, organic reagents, pharmaceutical factories), upgrade to SUS316 stainless steel
\nProhibited: Painted iron sheet, 201 stainless iron, thin iron sheet with stainless steel skin
\nQuick judgment method
\nThickness check
\nStandard for regular single-person workbench countertop \u2265 0.8mm, GMP for pharmaceutical factories recommends \u2265 1.0mm;
\nPressing the corners with a coin, obvious softness and depression indicates a thin plate of inferior quality;
\nPoorly bonded surface of the laminate will peel and delaminate at the bending point.
\nMagnetic test (distinguishing 304\/201\/iron sheet)
\nPure 304 stainless steel shows a normal weak magnetic attraction (due to processing and bending, martensite is produced), but it will not firmly hold the magnet and not fall off;
\n201 stainless iron, iron sheet: The magnet strongly attracts and cannot be removed;
\nNote: Do not rely solely on the magnet test; combined with corrosion test for accuracy.
\nAppearance weld process
\nAcceptable: Full welding, smooth polishing without burrs, flat seams, no weld holes (holes can harbor bacteria, not allowed in GMP);
\nPoor: Spot welding, large gaps, sharp burrs, dirt can be wiped off.
\nIdentification of labels
\nThe back of the regular sheet will have laser-engraved: SUS304 \/ SUS316; without engraving, it is likely to be a low-quality thin sheet.
\nCorrosion identification test on site (5-minute simple test)
\nReagents: Diluted 84 disinfectant (effective chlorine 5%), 75% ethanol, dilute hydrochloric acid;
\nOperation: Wipe the countertop and let it stand for 30 minutes, then wipe clean with water;
\n304 is acceptable: No rust spots, no whitening corrosion, no color fading;
\n201 \/ iron sheet: Yellow spots, rust spots, blackening; Painted countertop will directly peel and flake off.
\n2. Cabinet shell (frame)
\nTwo compliant solutions:
\nRegular laboratory: Cold-rolled steel plate + epoxy electrostatic spraying
\nAcceptance points: Uniform paint surface, no run-off, few scratches on\u78d5\u78b0\u9732\u51fa\u94c1\u76ae\uff1b Hard objects can be lightly scraped without revealing iron sheet\uff1b Seams sealed adhesive is flat and prevents mold.
\nHigh humidity \/ corrosive laboratory (microbiology\uff0c chemistry\uff0c fumigation disinfection)\uff1a Whole machine 304 stainless steel shell
\nProhibited\uff1a Ordinary paint thin iron sheet\uff0c prone to rust and flake off under long-term ultraviolet and alcohol fumigation.
\nPoor cabinet characteristics
\nThin iron sheet\uff0c pressing both sides of the cabinet body shows obvious deformation\uff1b
\nRough paint\uff0c edge corners with iron leakage\uff0c rusting within 1-2 months.
\n3. Observation window glass
\nStrict standard\uff1a 5mm tempered float glass
\nJudgment method\uff1a
\nThe corners of the glass must have 3C tempered marking\uff1b without 3C is ordinary glass\uff0c prone to cracking upon impact\uff1b
\nKnocking sound is clear\uff1b ordinary thin glass sounds dull\uff1b
\nSmooth up and down and push-pull\uff0c edges polished into rounded corners\uff0c no sharp edges to cut.
\n4. Internal return air duct\uff0c guide plate\uff0c support
\nUniform requirement\uff1a 304 stainless steel integrated bending parts
\nSafety\uff1a Plastic guide plate\uff0c long-term ultraviolet exposure aging and cracking\uff0c releasing volatile substances to contaminate samples.
\n5. Sealant strips\uff0c disinfection accessories
\nSealant\uff1a Food-grade anti-mold silicone rubber\uff0c white \/ semi-transparent\uff0c resistant to alcohol\uff0c ultraviolet without hardening\uff1b
\nPoor\uff1a Ordinary black rubber\uff0c 1-3 months harden and crack\uff0c damaging laminar flow\uff1b
\nUltraviolet lamp bracket\uff0c water tray\uff1a 304 stainless steel\uff0c plastic water tray prone to aging and leakage.
\n2. Professional tools for precise differentiation between 304 and 316 stainless steel (high-precision acceptance)
\n1. Stainless steel detection liquid (commonly available on the market\uff0c low cost)
\nDrop the detection liquid on the countertop and let it stand for 10 seconds\uff1a
\n304\uff1a Light gray \/ pale brown\uff1b
\n316\uff1a Basically unchanged color\uff1b 201 Stainless Steel: Turns Red Instantly;
\nAfter the test, wipe it clean with water immediately to avoid corrosion of the countertop.
\n2. Portable Metal Spectrometer (Third-party acceptance standard for pharmaceutical factories)
\nDirectly read the content of metal elements:
\nSUS304: Cr \u2265 18%, Ni \u2265 8%;
\nSUS316: Cr \u2265 16%, Ni \u2265 10%, Mo \u2265 2%;
\nWithout molybdenum element, it is directly determined that it is not 316.
\nIII. Data File Verification (Essential for bidding and GMP audits)
\nJust looking at the physical object is not enough; material certificates must be requested for archiving:
\nOriginal factory warranty certificate for stainless steel plates: indicates the grade 304\/316, plate thickness, furnace number;
\nSpray coating test report: adhesion, alcohol resistance, disinfection corrosion resistance test;
\n3C certification certificate for tempered glass;
\nMaterial list of the entire machine, distinguishes the materials of the countertop, shell, and diversion plate, and refuses the oral promises of the merchants.
\nIV. Comparison Table of Material Compliance Thresholds in Different Scenarios<\/p>\n
| Usage scenario<\/td>\n | Minimum requirements for countertop<\/td>\n | Recommended material for cabinet body<\/td>\n | Prohibited materials<\/td>\n<\/tr>\n |
| College ordinary cells, tissue culture<\/td>\n | SUS304 \u2265 0.8mm<\/td>\n | Cold rolling spraying<\/td>\n | 201, paint tin mesa<\/td>\n<\/tr>\n |
| Food \/ Pharmaceutical Sterility Testing GMP<\/td>\n | SUS304 \u2265 1.0mm fully welded<\/td>\n | Spraying \/ 100% 304 stainless steel<\/td>\n | Spot welding table surface, plastic guide component<\/td>\n<\/tr>\n |
| Chemical organic reagents, acid washing experiments<\/td>\n | SUS316 stainless steel<\/td>\n | The entire machine is made of 304 stainless steel.<\/td>\n | Ordinary spray cabinet body<\/td>\n<\/tr>\n |
| Fumigation disinfection, high-humidity microbiological laboratory<\/td>\n | SUS316<\/td>\n | All stainless steel complete machine<\/td>\n | Thin powder-coated body, prone to rusting<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n V. Common Material Forgery Identification Tips to Avoid Pitfalls Material acceptance criteria for ultra-clean workbench (covering the countertop, cabinet, glass, and accessories) The inspection process is divided into three parts: visual inspection and hand feel self-check, test for reagent corrosion, and verification of certificate materials. This is applicable for both laboratory and GMP inspections and can be directly used for product inspection. 1. Core […]<\/p>","protected":false},"author":12,"featured_media":5112,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[92],"tags":[],"class_list":["post-5556","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-technology"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.bacintl.com\/ar\/wp-json\/wp\/v2\/posts\/5556","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bacintl.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bacintl.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/ar\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/ar\/wp-json\/wp\/v2\/comments?post=5556"}],"version-history":[{"count":1,"href":"https:\/\/www.bacintl.com\/ar\/wp-json\/wp\/v2\/posts\/5556\/revisions"}],"predecessor-version":[{"id":5557,"href":"https:\/\/www.bacintl.com\/ar\/wp-json\/wp\/v2\/posts\/5556\/revisions\/5557"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/ar\/wp-json\/wp\/v2\/media\/5112"}],"wp:attachment":[{"href":"https:\/\/www.bacintl.com\/ar\/wp-json\/wp\/v2\/media?parent=5556"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bacintl.com\/ar\/wp-json\/wp\/v2\/categories?post=5556"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bacintl.com\/ar\/wp-json\/wp\/v2\/tags?post=5556"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} |