{"id":3500,"date":"2026-09-11T10:20:23","date_gmt":"2026-09-11T10:20:23","guid":{"rendered":"https:\/\/www.qeehuaplastic.com\/?p=3500"},"modified":"2026-09-08T06:32:02","modified_gmt":"2026-09-08T06:32:02","slug":"pp-ductwork-acid-fume-extraction-rfq-checklist","status":"publish","type":"post","link":"https:\/\/www.qeehuaplastic.com\/ru\/pp-ductwork-acid-fume-extraction-rfq-checklist\/","title":{"rendered":"\u0427\u0442\u043e \u0434\u043e\u043b\u0436\u043d\u043e \u0431\u044b\u0442\u044c \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u043e \u0432 \u0437\u0430\u043f\u0440\u043e\u0441 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043f\u043e \u043f\u043e\u043b\u0438\u043f\u0440\u043e\u043f\u0438\u043b\u0435\u043d\u043e\u0432\u044b\u043c \u0432\u043e\u0437\u0434\u0443\u0445\u043e\u0432\u043e\u0434\u0430\u043c \u0434\u043b\u044f \u0432\u044b\u0442\u044f\u0436\u043a\u0438 \u043a\u0438\u0441\u043b\u043e\u0442\u043d\u044b\u0445 \u043f\u0430\u0440\u043e\u0432?"},"content":{"rendered":"<article class=\"qeehua-article--pp-weld-inspection\">\n<style>\n    .qeehua-article--pp-weld-inspection{color:#25313b;font-family:Arial,Helvetica,sans-serif;line-height:1.7;max-width:1120px;margin:0 auto}\n    .qeehua-article--pp-weld-inspection h1,.qeehua-article--pp-weld-inspection h2,.qeehua-article--pp-weld-inspection h3{color:#17212b;line-height:1.25}\n    .qeehua-article--pp-weld-inspection h1{font-size:clamp(2rem,4vw,3rem);margin:0 0 1rem}\n    .qeehua-article--pp-weld-inspection h2{font-size:clamp(1.45rem,2.4vw,2rem);margin:2.4rem 0 .8rem}\n    .qeehua-article--pp-weld-inspection h3{font-size:1.15rem;margin:1.5rem 0 .5rem}\n    .qeehua-article--pp-weld-inspection p{margin:.85rem 0}\n    .qeehua-article--pp-weld-inspection a{color:#fc6d00;text-decoration:underline;text-underline-offset:2px}\n    .qeehua-article--pp-weld-inspection .qeehua-lead{font-size:1.15rem;color:#3b4650}\n    .qeehua-article--pp-weld-inspection .qeehua-answer{background:#f5f7f8;border-left:4px solid #e8752a;padding:1rem 1.2rem;margin:1.4rem 0}\n    .qeehua-article--pp-weld-inspection figure{margin:1.6rem 0 2rem}\n    .qeehua-article--pp-weld-inspection img{display:block;width:100%;height:auto;max-width:100%;border-radius:4px}\n    .qeehua-article--pp-weld-inspection figcaption{font-size:.9rem;color:#5f6a73;margin-top:.45rem}\n    .qeehua-article--pp-weld-inspection table{border-collapse:collapse;width:100%;margin:1rem 0 1.4rem;font-size:.97rem}\n    .qeehua-article--pp-weld-inspection th,.qeehua-article--pp-weld-inspection td{border:1px solid #d9e0e4;padding:.7rem;text-align:left;vertical-align:top}\n    .qeehua-article--pp-weld-inspection th{background:#f3f5f6;color:#17212b}\n    .qeehua-article--pp-weld-inspection ul,.qeehua-article--pp-weld-inspection ol{padding-left:1.35rem}\n    .qeehua-article--pp-weld-inspection .qeehua-video-block{width:100%;margin:2rem 0}\n    .qeehua-article--pp-weld-inspection .qeehua-video-reference{font-size:.95rem;font-style:italic;color:#5f6a73;margin:.65rem auto 0;max-width:900px}\n    .qeehua-article--pp-weld-inspection .qeehua-faq details{border-top:1px solid #d9e0e4;padding:.8rem 0}\n    .qeehua-article--pp-weld-inspection .qeehua-faq details:last-child{border-bottom:1px solid #d9e0e4}\n    .qeehua-article--pp-weld-inspection .qeehua-faq summary{cursor:pointer;font-weight:700;color:#17212b}\n    .qeehua-article--pp-weld-inspection .qeehua-cta{background:#fa7917;color:#fff;padding:1.25rem 1.35rem;margin-top:2rem}\n    .qeehua-article--pp-weld-inspection .qeehua-cta a,.qeehua-article--pp-weld-inspection .qeehua-cta h2{color:#fff}\n    .qeehua-article--pp-weld-inspection .qeehua-note{font-size:.92rem;color:#56616a}\n    @media (max-width:700px){.qeehua-article--pp-weld-inspection table{display:block;overflow-x:auto;white-space:normal}.qeehua-article--pp-weld-inspection th,.qeehua-article--pp-weld-inspection td{min-width:175px}}\n  <\/style>\n<p class=\"qeehua-lead\">A PP ductwork RFQ for acid fume extraction should define the emission source, chemical and temperature data supplied by the process owner, required airflow or pressure basis, route, interfaces, fabrication scope, inspection records, and commissioning responsibilities. Without those inputs, a supplier cannot responsibly confirm material suitability or a complete duct system.<\/p>\n<aside class=\"qeehua-answer\"><strong>Short answer:<\/strong> Ask for a drawing-led quotation that connects each capture point to the duct route, fan or treatment interface, supports, access requirements, and acceptance documents. State what is known, identify the unresolved process data, and keep performance design responsibility explicit.<\/p>\n<\/aside>\n<h2>Start the RFQ with the Acid Fume Capture Problem<\/h2>\n<p>Begin with the process, not a generic duct diameter. Identify every tank, hood, enclosure, pickling line, or other emission point; its operating cycle; nearby openings; and where operators work. Local exhaust ventilation is intended to capture contaminants at or near their source before they disperse, so the capture point and operating conditions belong in the request. <a href=\"https:\/\/www.osha.gov\/otm\/section-3-health-hazards\/chapter-3\" target=\"_blank\" rel=\"noopener noreferrer\">OSHA\u2019s ventilation primer<\/a> provides general background on that control principle.<\/p>\n<p>State the exact chemical names, concentrations, temperatures, mist or vapour conditions, and any cleaning or upset conditions that the process owner can provide. These are project inputs, not values to infer from the term \u201cacid fume.\u201d QEEHUA-specific material suitability and fabrication details should be confirmed against the actual service conditions. For the preceding selection question, see <a href=\"https:\/\/www.qeehuaplastic.com\/pp-sheet-for-chemical-exhaust-ductwork\/\">PP sheet for chemical exhaust ductwork: selection guide<\/a>.<\/p>\n<h2>Define the System Boundary and Air-Side Data<\/h2>\n<p>Make the quotation boundary visible on a layout drawing. Mark where the supply begins and ends, which items are by others, and the intended connection to hoods, fans, scrubbers, stacks, dampers, or existing ducts. Include the design airflow or pressure information supplied by the ventilation designer, or state that it remains to be provided. Do not ask a material supplier to silently assume the ventilation duty.<\/p>\n<div class=\"qeehua-checklist\">\n<h3>Process and air-side inputs to request<\/h3>\n<ul>\n<li>Equipment list, capture-point locations, hood or enclosure drawings, and operating modes.<\/li>\n<li>Known chemical, concentration, temperature, moisture, particulate, mist, and cleaning conditions.<\/li>\n<li>Airflow, pressure, fan, scrubber, and stack data supplied by the responsible ventilation designer.<\/li>\n<li>Required capture performance, applicable site standards, and any emission-control acceptance criteria.<\/li>\n<li>Existing-system survey information where the new ductwork joins installed equipment.<\/li>\n<\/ul>\n<\/div>\n<p>HSE guidance treats a local exhaust system as a connected set of hoods, ducts, air movers, air cleaners, and supporting documentation. Its RFQ guidance is useful for defining design, commissioning, and documentation deliverables without substituting for the project engineer\u2019s calculation. <a href=\"https:\/\/www.hse.gov.uk\/pubns\/books\/hsg258.htm\" target=\"_blank\" rel=\"noopener noreferrer\">HSE HSG258<\/a> is a general reference for those system elements.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/www.qeehuaplastic.com\/wp-content\/uploads\/2026\/07\/waste-gas-treatment-pp-scrubber.jpg\" alt=\"QEEHUA PP waste-gas treatment scrubber equipment\" \/><figcaption>Where ductwork connects to treatment equipment, show the interface and responsibility boundary in the RFQ rather than describing the connection only in prose.<\/figcaption><\/figure>\n<h2>Specify the PP Ductwork Scope by Drawing<\/h2>\n<p>Use plans, elevations, sections, and an isometric or spool schedule when available. Identify straight runs, elbows, branches, transitions, inspection openings, drain points, expansion provisions, removable sections, flanges, gaskets, fasteners, supports, and penetration details. If a component is to match existing equipment, provide photographs, dimensions, and the mating-interface information rather than relying on a site name.<\/p>\n<table>\n<thead>\n<tr>\n<th>RFQ section<\/th>\n<th>Information to include<\/th>\n<th>Why it changes the quotation<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Route and geometry<\/td>\n<td>Drawings, elevations, clearances, branch locations, bends, and transitions.<\/td>\n<td>Defines fabrication pieces, site fit-up, access, and interfaces.<\/td>\n<\/tr>\n<tr>\n<td>Connections<\/td>\n<td>Mating dimensions, flange standard or project detail, gasket and fastener requirements, and items by others.<\/td>\n<td>Prevents a fabricated duct section from arriving without a defined connection boundary.<\/td>\n<\/tr>\n<tr>\n<td>Support and access<\/td>\n<td>Support responsibility, building attachment limits, access doors, inspection points, and maintenance clearances.<\/td>\n<td>Separates duct fabrication from structural, installation, and service work.<\/td>\n<\/tr>\n<tr>\n<td>Documentation<\/td>\n<td>Submittals, drawings, material identification, inspection records, packing, and handover requirements.<\/td>\n<td>Lets the supplier price the requested evidence and turnover package.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>For the base-material documentation path, link the RFQ to the <a href=\"https:\/\/www.qeehuaplastic.com\/pp-sheet-material-submittal-epc-projects\/\">PP sheet material submittal checklist for EPC projects<\/a>. A material submittal and a ventilation design are different documents; the RFQ should request both where the project needs them.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/www.qeehuaplastic.com\/wp-content\/uploads\/2026\/07\/pp-process-enclosure-workshop-enhanced.jpg\" alt=\"QEEHUA PP process enclosure in a workshop\" \/><figcaption>Enclosures, access points, and branch connections need drawings and interface details before ductwork can be quoted as a defined scope.<\/figcaption><\/figure>\n<h2>Separate Fabrication, Installation, and Commissioning Responsibilities<\/h2>\n<p>State whether the quotation is for supplied components only, shop fabrication, site installation, or a defined combination. Name who provides field measurements, lifting, supports, site welding, leak checks, airflow testing, commissioning, and the final system performance decision. A clear split protects both the purchaser and the supplier from treating an incomplete equipment scope as a turnkey ventilation commitment.<\/p>\n<p>If the ductwork discharges to a wet scrubber, identify the handoff point and review the associated equipment scope. QEEHUA\u2019s <a href=\"https:\/\/www.qeehuaplastic.com\/pp-sheet-wet-scrubbers-material-checks\/\">PP sheet for wet scrubbers<\/a> guide can help frame the fabricated-equipment discussion, but it does not replace process, ventilation, or emissions engineering for a specific installation.<\/p>\n<h2>Ask for the Acceptance and Handover Record Up Front<\/h2>\n<p>Include the required drawing approvals, material identification, fabrication inspection, packaging, delivery, and turnover documents in the RFQ. If the buyer requires a particular test, method, witness point, or report format, name it before quotation. Do not convert general ventilation guidance into an unagreed acceptance test; the project owner and responsible engineer must define the acceptance basis.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/www.qeehuaplastic.com\/wp-content\/uploads\/2026\/07\/exhaust-treatment-workshop-enhanced.jpg\" alt=\"QEEHUA PP exhaust treatment equipment in a workshop\" \/><figcaption>Use an RFQ deliverables list to tie fabricated duct sections to drawings, identified interfaces, inspection records, and the planned handover package.<\/figcaption><\/figure>\n<h2>PP Sheet Production Context for the RFQ<\/h2>\n<p>The RFQ should distinguish material supply and fabricated ductwork from the system\u2019s capture and ventilation performance design. The following QEEHUA video is included only as context for PP sheet production; it does not demonstrate acid compatibility, duct sizing, capture performance, or commissioning.<\/p>\n<div class=\"qeehua-video-block\" style=\"margin:32px 0;\">\n<div style=\"position:relative;width:100%;padding-top:56.25%;overflow:hidden;border-radius:4px;background:#111;\">\n    <iframe src=\"https:\/\/www.youtube.com\/embed\/trZ-oVldTpA\" title=\"PP Sheet Extrusion: Pneumatic Control Panel | QEEHUA\" loading=\"lazy\" style=\"position:absolute;inset:0;width:100%;height:100%;border:0;\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n  <\/div>\n<p style=\"margin-top:10px;font-style:italic;color:#5b6470;\"><strong>Video reference:<\/strong> \u201cPP Sheet Extrusion: Pneumatic Control Panel | QEEHUA\u201d shows a PP sheet production control stage. It is relevant only to material-production context and does not validate a ductwork RFQ or a finished extraction system.<\/p>\n<\/div>\n<h2>FAQ<\/h2>\n<section class=\"qeehua-faq\">\n<details>\n<summary>What process data should an acid fume ductwork RFQ include?<\/summary>\n<p>Include the identified emission points, chemical names, concentrations, temperatures, mist or vapour conditions, operating modes, and any cleaning or upset conditions the process owner can provide.<\/p>\n<\/details>\n<details>\n<summary>Should an RFQ state the airflow for PP ductwork?<\/summary>\n<p>Yes. Include the airflow or pressure basis supplied by the responsible ventilation designer, or explicitly state that it remains to be provided. A material supplier should not be asked to assume the ventilation duty.<\/p>\n<\/details>\n<details>\n<summary>What drawings are useful for a PP ductwork quotation?<\/summary>\n<p>Provide plans, elevations, sections, and an isometric or spool schedule when available. Mark routes, bends, branches, transitions, connection interfaces, supports, clearances, access points, and items by others.<\/p>\n<\/details>\n<details>\n<summary>Does a PP ductwork RFQ prove chemical suitability?<\/summary>\n<p>No. The RFQ supplies the service data needed for review. QEEHUA-specific material suitability and fabrication details require confirmation against the actual project conditions.<\/p>\n<\/details>\n<\/section>\n<section class=\"qeehua-cta\">\n<h2>Send QEEHUA a drawing-led ductwork request<\/h2>\n<p>Share the equipment layout, process conditions, connection details, required documentation, and the defined scope of supply. QEEHUA can then review the PP material and fabricated-component request with the project information in view.<\/p>\n<p><a href=\"https:\/\/www.qeehuaplastic.com\/contact\/\">Contact QEEHUA about PP ductwork fabrication<\/a><\/p>\n<\/section>\n<p><script type=\"application\/ld+json\">\n  {\n    \"@context\":\"https:\/\/schema.org\",\n    \"@graph\":[\n      {\"@type\":\"BlogPosting\",\"headline\":\"What Should a PP Ductwork RFQ Include for Acid Fume Extraction?\",\"mainEntityOfPage\":\"https:\/\/www.qeehuaplastic.com\/pp-ductwork-acid-fume-extraction-rfq-checklist\/\"},\n      {\"@type\":\"FAQPage\",\"mainEntity\":[\n        {\"@type\":\"Question\",\"name\":\"What process data should an acid fume ductwork RFQ include?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Include the identified emission points, chemical names, concentrations, temperatures, mist or vapour conditions, operating modes, and any cleaning or upset conditions the process owner can provide.\"}},\n        {\"@type\":\"Question\",\"name\":\"Should an RFQ state the airflow for PP ductwork?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Include the airflow or pressure basis supplied by the responsible ventilation designer, or explicitly state that it remains to be provided. A material supplier should not be asked to assume the ventilation duty.\"}},\n        {\"@type\":\"Question\",\"name\":\"What drawings are useful for a PP ductwork quotation?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Provide plans, elevations, sections, and an isometric or spool schedule when available. Mark routes, bends, branches, transitions, connection interfaces, supports, clearances, access points, and items by others.\"}},\n        {\"@type\":\"Question\",\"name\":\"Does a PP ductwork RFQ prove chemical suitability?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The RFQ supplies the service data needed for review. QEEHUA-specific material suitability and fabrication details require confirmation against the actual project conditions.\"}}\n      ]}\n    ]\n  }\n  <\/script><\/p>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>A PP ductwork RFQ for acid fume extraction should define the emission source, chemical and temperature data supplied by the process owner, required airflow or pressure basis, route, interfaces, fabrication scope, inspection records, and commissioning responsibilities. Without those inputs, a supplier cannot responsibly confirm material suitability or a complete duct system. Short answer: Ask for [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2081,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"class_list":["post-3500","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge"],"_links":{"self":[{"href":"https:\/\/www.qeehuaplastic.com\/ru\/wp-json\/wp\/v2\/posts\/3500","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.qeehuaplastic.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.qeehuaplastic.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.qeehuaplastic.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.qeehuaplastic.com\/ru\/wp-json\/wp\/v2\/comments?post=3500"}],"version-history":[{"count":8,"href":"https:\/\/www.qeehuaplastic.com\/ru\/wp-json\/wp\/v2\/posts\/3500\/revisions"}],"predecessor-version":[{"id":3816,"href":"https:\/\/www.qeehuaplastic.com\/ru\/wp-json\/wp\/v2\/posts\/3500\/revisions\/3816"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.qeehuaplastic.com\/ru\/wp-json\/wp\/v2\/media\/2081"}],"wp:attachment":[{"href":"https:\/\/www.qeehuaplastic.com\/ru\/wp-json\/wp\/v2\/media?parent=3500"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.qeehuaplastic.com\/ru\/wp-json\/wp\/v2\/categories?post=3500"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.qeehuaplastic.com\/ru\/wp-json\/wp\/v2\/tags?post=3500"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}