{"id":1288,"date":"2022-08-08T16:31:59","date_gmt":"2022-08-08T08:31:59","guid":{"rendered":"https:\/\/limegreen-okapi-448594.hostingersite.com\/?page_id=1288"},"modified":"2026-07-27T18:14:36","modified_gmt":"2026-07-27T10:14:36","slug":"ministry-of-chemical-industry-standard","status":"publish","type":"page","link":"https:\/\/raymonvalve.com\/pt\/ministry-of-chemical-industry-standard\/","title":{"rendered":"Guia de Normas para V\u00e1lvulas da Ind\u00fastria Qu\u00edmica HG e HG\/T"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"1288\" class=\"elementor elementor-1288\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2c466c4c e-con-full e-flex e-con e-parent\" data-id=\"2c466c4c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-95dfe862 elementor-widget elementor-widget-html\" data-id=\"95dfe862\" data-element_type=\"widget\" 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.rv-actions{margin-top:22px}}.rv-topicgrid,.rv-routegrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}.rv-topic,.rv-route{padding:22px;border:1px solid var(--rv-line);border-radius:12px;background:#fff}.rv-topic b,.rv-route b{display:block;color:var(--rv-blue);margin-bottom:7px}.rv-topic p,.rv-route p{margin:0;color:#667085;font-size:14px}.rv-limitgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}.rv-limit{padding:24px;border-radius:12px;background:#fff;color:#26344d}.rv-limit h3{margin:0 0 10px;color:#1f29bd;font-size:19px}.rv-limit p{margin:0;font-size:14px}.rv-trust{padding:26px;border:1px solid var(--rv-line);border-left:5px solid var(--rv-blue);border-radius:10px;background:#f8faff}.rv-trustgrid{display:grid;grid-template-columns:1fr 1fr;gap:18px 30px}.rv-trust b{display:block;color:var(--rv-ink);margin-bottom:5px}.rv-trust p{margin:0;color:#667085;font-size:14px}.rv-trustlinks{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.rv-trustlinks a{color:var(--rv-blue);font-size:13px;font-weight:800}body.page-id-1288 #content,body.page-id-1288 .site-content,body.page-id-1288 #primary,body.page-id-1288 #main,body.page-id-1288 .entry-content{margin-top:0!important;padding-top:0!important}body.page-id-1288 .site-content>.ast-container{max-width:100%!important;padding-left:0!important;padding-right:0!important}@media(max-width:980px){.rv-topicgrid,.rv-routegrid,.rv-limitgrid{grid-template-columns:1fr 1fr}}@media(max-width:640px){.rv-topicgrid,.rv-routegrid,.rv-limitgrid,.rv-trustgrid{grid-template-columns:1fr}}<\/style><main class=\"rv-cat\">\n<section class=\"rv-hero\"><div class=\"rv-wrap\"><div class=\"rv-crumb\"><a href=\"\/\">Home<\/a> \/ <a href=\"\/support\/\">Resources<\/a> \/ HG and HG\/T Chemical Industry Valve Standards Guide<\/div><div class=\"rv-kicker\" style=\"color:#f3cc18\">Chemical industry document hierarchy and verification<\/div><h1 class=\"rv-title\">HG and HG\/T Standards in Chemical-Plant Valve Specifications<\/h1><p>Chinese chemical-industry project documents may cite HG or HG\/T standards for piping components, flanges, gaskets, materials, installation or related engineering practices. That does not mean one \u201cMinistry of Chemical Industry valve standard\u201d defines the whole valve. The responsible engineer must verify the exact designation, issuing authority, present status and technical scope, then coordinate it with national standards, valve product standards, pressure-piping rules, owner specifications and the approved datasheet.<\/p><div class=\"rv-actions\"><a class=\"rv-btn rv-primary\" href=\"\/contact\/\">Request Technical Review<\/a><a class=\"rv-btn rv-ghost\" href=\"#technical-scope\">Open Technical Scope<\/a><\/div><div class=\"rv-pills\"><span class=\"rv-pill\">HG\/HG\/T identity<\/span><span class=\"rv-pill\">Chemical service inputs<\/span><span class=\"rv-pill\">Piping-interface coordination<\/span><span class=\"rv-pill\">Specification precedence<\/span><\/div><\/div><\/section>\n<section id=\"technical-scope\" class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Technical scope<\/div><h2 class=\"rv-h2\">Place HG-family requirements in the correct chemical-project context<\/h2><div class=\"rv-topicgrid\"><div class=\"rv-topic\"><b>Identify the exact document<\/b><p>Record prefix, number, part, year and Chinese title. Informal translated names are not sufficient for engineering release.<\/p><\/div><div class=\"rv-topic\"><b>Verify issuing and status information<\/b><p>Use official Chinese standards or industry-standard sources and project document control to confirm current or contract status.<\/p><\/div><div class=\"rv-topic\"><b>Define the controlled component<\/b><p>Determine whether the document governs a flange, gasket, piping component, material, test method or broader engineering practice.<\/p><\/div><div class=\"rv-topic\"><b>Integrate the valve product standard<\/b><p>The valve's design and construction can still be governed by GB, GB\/T, API, ASME, ISO or another approved product document.<\/p><\/div><div class=\"rv-topic\"><b>Use real chemical service data<\/b><p>Fluid composition, concentration, phase, contaminants, pressure, temperature and upset conditions drive material and sealing decisions.<\/p><\/div><div class=\"rv-topic\"><b>Apply project precedence<\/b><p>Owner specification, process datasheet, piping class and standards may conflict. Use the approved precedence rule and formal clarification process.<\/p><\/div><\/div><\/div><\/section>\n<section class=\"rv-section rv-dark\"><div class=\"rv-wrap\"><div class=\"rv-kicker\" style=\"color:#f3cc18\">Evidence matrix<\/div><h2 class=\"rv-h2\">Coordinate chemical-service requirements across document layers<\/h2><div class=\"rv-tablewrap\"><table class=\"rv-table\"><thead><tr><th>Document layer<\/th><th>Typical responsibility<\/th><th>Valve review question<\/th><th>Evidence or decision<\/th><\/tr><\/thead><tbody><tr><td>Law, regulation and pressure-equipment rules<\/td><td>Jurisdictional safety and conformity obligations.<\/td><td>Which rules apply at the installation location and who is responsible for conformity assessment?<\/td><td>Compliance plan, responsible-party confirmation and required statutory records.<\/td><\/tr><tr><td>Owner or EPC project specification<\/td><td>Service philosophy, approved makes\/materials, deviations, documentation and quality intervention.<\/td><td>Which clauses supplement or override general standards under the contract?<\/td><td>Requirement register, deviation log and approved technical bid evaluation.<\/td><\/tr><tr><td>Piping material class<\/td><td>Permitted component materials, ratings, ends, gaskets, bolting and branch\/interface rules.<\/td><td>Does the proposed valve match the piping class at both connections and all design cases?<\/td><td>Approved valve datasheet, piping-class cross-check and interface drawing.<\/td><\/tr><tr><td>HG or HG\/T industry document<\/td><td>Specific chemical-industry component, interface or engineering practice within its scope.<\/td><td>What exact function does the cited document control, and is its edition\/status accepted?<\/td><td>Standards register entry and mapped clauses or dimensions.<\/td><\/tr><tr><td>Valve product\/test standard<\/td><td>Valve construction, pressure rating, dimensions, testing or qualification as applicable.<\/td><td>Which product and test documents complete the requirements not controlled by the HG-family reference?<\/td><td>Design review, approved procedures and tag-linked test evidence.<\/td><\/tr><tr><td>Process and corrosion basis<\/td><td>Actual chemical environment, materials strategy and operational hazards.<\/td><td>Are composition, concentration, water content, temperature, phase, velocity and cleaning conditions defined?<\/td><td>Materials selection basis, corrosion review and agreed operating envelope.<\/td><\/tr><\/tbody><\/table><\/div><\/div><\/section>\n<section class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Engineering evidence<\/div><h2 class=\"rv-h2\">Chemical-service questions a standards list cannot answer alone<\/h2><div class=\"rv-routegrid\"><div class=\"rv-route\"><b>Composition<\/b><p>Name all relevant constituents, concentrations, impurities and expected variability.<\/p><\/div><div class=\"rv-route\"><b>Physical state<\/b><p>Identify liquid, vapor, mixed phase, solids and flashing or crystallization risks.<\/p><\/div><div class=\"rv-route\"><b>Temperature cases<\/b><p>Include normal, startup, cleaning, regeneration, upset and ambient minimum conditions.<\/p><\/div><div class=\"rv-route\"><b>Materials boundary<\/b><p>Define pressure-boundary, trim, seats, packing, gaskets, bolting, coatings and overlays separately.<\/p><\/div><div class=\"rv-route\"><b>Containment objective<\/b><p>State permitted internal leakage, external emissions and fire or toxicity controls.<\/p><\/div><div class=\"rv-route\"><b>Maintenance strategy<\/b><p>Consider isolation, flushing, draining, decontamination, access, spare parts and safe removal.<\/p><\/div><\/div><\/div><\/section>\n<section class=\"rv-section rv-dark\"><div class=\"rv-wrap\"><div class=\"rv-kicker\" style=\"color:#f3cc18\">Technical boundaries<\/div><h2 class=\"rv-h2\">Claims and shortcuts this page does not support<\/h2><div class=\"rv-limitgrid\"><div class=\"rv-limit\"><h3>Chemical compatibility cannot be inferred from a standard number<\/h3><p>Material suitability depends on the actual fluid chemistry, concentration, temperature, phase, contaminants and operating history.<\/p><\/div><div class=\"rv-limit\"><h3>A flange reference does not define the complete valve<\/h3><p>Product construction, rating, trim, sealing, tests, emissions and documentation still require separate requirements.<\/p><\/div><div class=\"rv-limit\"><h3>Legacy ministry terminology can be misleading<\/h3><p>Administrative names and document systems evolve. Verify the exact current or contract designation rather than relying on an old English page title.<\/p><\/div><\/div><\/div><\/section>\n<section class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Controlled workflow<\/div><h2 class=\"rv-h2\">From requirement to auditable evidence<\/h2><div class=\"rv-flow\"><div class=\"rv-step\"><b>1. Collect project-controlled inputs<\/b><span>Gather process data, piping class, datasheet, owner specification and all cited standards.<\/span><\/div><div class=\"rv-step\"><b>2. Verify each HG-family citation<\/b><span>Confirm exact identity, title, scope, status and contract edition through authoritative sources.<\/span><\/div><div class=\"rv-step\"><b>3. Build the requirements hierarchy<\/b><span>Assign governing documents for interfaces, valve design, materials, tests and documentation.<\/span><\/div><div class=\"rv-step\"><b>4. Complete the chemical-service review<\/b><span>Assess corrosion, permeation, erosion, crystallization, emissions, fire and cleaning risks.<\/span><\/div><div class=\"rv-step\"><b>5. Evaluate the supplier proposal<\/b><span>Compare materials, construction, deviations, qualifications and inspection plan with the approved basis.<\/span><\/div><div class=\"rv-step\"><b>6. Freeze and trace the decision<\/b><span>Release drawings and requirements, then link manufacturing and test records to the valve tags.<\/span><\/div><\/div><\/div><\/section>\n<section class=\"rv-section rv-dark\"><div class=\"rv-wrap\"><div class=\"rv-kicker\" style=\"color:#f3cc18\">Project checklist<\/div><h2 class=\"rv-h2\">Information and records to define<\/h2><div class=\"rv-check\"><div>Exact HG\/HG\/T designation, part, year and Chinese title<\/div><div>Official or project-approved status and issuing authority<\/div><div>Installation jurisdiction and pressure-equipment obligations<\/div><div>Owner\/EPC specification and piping material class<\/div><div>Full fluid composition, concentration, phase and contaminants<\/div><div>Normal, startup, shutdown, cleaning and upset conditions<\/div><div>Valve product, rating, dimensions, materials and test standards<\/div><div>Deviation approvals, inspection points and final evidence package<\/div><\/div><\/div><\/section>\n<section class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Technical authority and scope<\/div><h2 class=\"rv-h2\">How this resource should be used<\/h2><div class=\"rv-trust\"><div class=\"rv-trustgrid\"><div><b>Primary search intent<\/b><p>Project-specification guidance for EPC, procurement and plant engineers who encounter HG or HG\/T references and need to integrate them correctly into a chemical-service valve requirement hierarchy.<\/p><\/div><div><b>Technical content owner<\/b><p>Raymon Valve technical content team. Final project decisions require the controlled documents and responsible engineer or quality reviewer.<\/p><\/div><div><b>Standards boundary<\/b><p>This is a scope-mapping guide, not an official publication or translation. It intentionally avoids unverified legacy clause numbers. Confirm exact HG\/HG\/T identity and status through authoritative Chinese sources and the project document register; the controlled contract documents govern.<\/p><\/div><div><b>Review status<\/b><p>Technical scope reviewed 27 July 2026. Editions, procedures, acceptance criteria and product evidence must be reconfirmed before order.<\/p><\/div><\/div><div class=\"rv-trustlinks\"><a href=\"\/support\/\">Resource Center<\/a><a href=\"\/valve-standards\/\">Valve Standards<\/a><a href=\"\/valve-inspection\/\">Inspection &amp; Testing<\/a><a href=\"\/contact\/\">Request Technical Review<\/a><\/div><\/div><\/div><\/section>\n<section class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Frequently asked questions<\/div><h2 class=\"rv-h2\">HG and HG\/T Chemical Industry Valve Standards Guide FAQ<\/h2><div class=\"rv-faq\"><details><summary>What do HG and HG\/T mean in a Chinese project specification?<\/summary><p>They identify chemical-industry standard designations, but the exact category, issuer, title, scope and status must be verified for the cited document. The prefix alone does not define a valve design.<\/p><\/details><details><summary>Does an HG\/T flange requirement replace the valve product standard?<\/summary><p>Usually not. A flange or piping-interface requirement controls that defined interface, while valve construction, rating, materials, testing and special qualifications may come from other approved documents.<\/p><\/details><details><summary>Can a supplier substitute an ASME flange for an HG\/T flange?<\/summary><p>Only after dimensional, rating, material, facing, gasket, bolting and project-code compatibility are compared and the deviation is formally approved. Similar nominal sizes or pressures do not prove interchangeability.<\/p><\/details><details><summary>What is the most important input for a chemical-service valve?<\/summary><p>The complete operating and chemical environment is essential: composition, concentration, temperature, pressure, phase, contaminants, velocity, cycling, cleaning and upset cases. Standards selection follows that service definition.<\/p><\/details><\/div><\/div><\/section>\n<section class=\"rv-section\" style=\"padding-top:0\"><div class=\"rv-wrap\"><div class=\"rv-cta\"><div><div class=\"rv-kicker\" style=\"color:#f3cc18\">Technical evidence review<\/div><h2>Send the requirement and the evidence you need to verify<\/h2><p>We will identify the applicable scope, missing records and approval path without inventing compliance claims.<\/p><\/div><div class=\"rv-actions\"><a class=\"rv-btn rv-primary\" href=\"\/contact\/\">Request Technical Review<\/a><\/div><\/div><\/div><\/section>\n<\/main><script type=\"application\/ld+json\">[{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/raymonvalve.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Resources\",\"item\":\"https:\/\/raymonvalve.com\/support\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"HG and HG\/T Chemical Industry Valve Standards Guide\",\"item\":\"https:\/\/raymonvalve.com\/ministry-of-chemical-industry-standard\/\"}]},{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What do HG and HG\/T mean in a Chinese project specification?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"They identify chemical-industry standard designations, but the exact category, issuer, title, scope and status must be verified for the cited document. The prefix alone does not define a valve design.\"}},{\"@type\":\"Question\",\"name\":\"Does an HG\/T flange requirement replace the valve product standard?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Usually not. A flange or piping-interface requirement controls that defined interface, while valve construction, rating, materials, testing and special qualifications may come from other approved documents.\"}},{\"@type\":\"Question\",\"name\":\"Can a supplier substitute an ASME flange for an HG\/T flange?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Only after dimensional, rating, material, facing, gasket, bolting and project-code compatibility are compared and the deviation is formally approved. Similar nominal sizes or pressures do not prove interchangeability.\"}},{\"@type\":\"Question\",\"name\":\"What is the most important input for a chemical-service valve?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The complete operating and chemical environment is essential: composition, concentration, temperature, pressure, phase, contaminants, velocity, cycling, cleaning and upset cases. Standards selection follows that service definition.\"}}]}]<\/script>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Chinese chemical-industry project documents may cite HG or HG\/T standards for piping components, flanges, gaskets, materials, installation or related engineering practices.<\/p>","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"full-width","ast-site-content-layout":"full-width","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-1288","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/pages\/1288","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/comments?post=1288"}],"version-history":[{"count":67,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/pages\/1288\/revisions"}],"predecessor-version":[{"id":13490,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/pages\/1288\/revisions\/13490"}],"wp:attachment":[{"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/media?parent=1288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}