{"id":19460,"date":"2024-09-07T02:10:24","date_gmt":"2024-09-07T02:10:24","guid":{"rendered":"https:\/\/ifanplus.com\/?p=19460"},"modified":"2025-04-22T16:57:17","modified_gmt":"2025-04-22T08:57:17","slug":"resistance-a-haute-temperature-des-raccords-ppr","status":"publish","type":"post","link":"https:\/\/ifanplus.com\/fr\/connaissance\/resistance-a-haute-temperature-des-raccords-ppr\/","title":{"rendered":"R\u00e9sistance aux hautes temp\u00e9ratures des raccords PPR"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Les raccords en PPR (polypropyl\u00e8ne copolym\u00e8re al\u00e9atoire) ont gagn\u00e9 en popularit\u00e9 dans les syst\u00e8mes de plomberie gr\u00e2ce \u00e0 leur durabilit\u00e9 exceptionnelle, leur r\u00e9sistance chimique et leur facilit\u00e9 d&#039;installation. Parmi leurs nombreux avantages, leur r\u00e9sistance aux temp\u00e9ratures \u00e9lev\u00e9es est un facteur essentiel. Cette caract\u00e9ristique garantit leur performance dans des environnements o\u00f9 les temp\u00e9ratures peuvent atteindre des niveaux extr\u00eames, ce qui les rend id\u00e9aux pour les syst\u00e8mes d&#039;alimentation en eau chaude et les applications industrielles.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-material-structure-and-composition\">Structure et composition du mat\u00e9riau<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">La r\u00e9sistance aux hautes temp\u00e9ratures des raccords en PPR r\u00e9side dans leur composition. Le PPR, un thermoplastique, pr\u00e9sente une structure copolym\u00e8re al\u00e9atoire qui am\u00e9liore sa capacit\u00e9 \u00e0 supporter les contraintes thermiques. Les cha\u00eenes polym\u00e8res du PPR sont agenc\u00e9es de mani\u00e8re \u00e0 conserver leurs propri\u00e9t\u00e9s m\u00e9caniques m\u00eame \u00e0 temp\u00e9ratures \u00e9lev\u00e9es. Cette structure mol\u00e9culaire conf\u00e8re la r\u00e9sistance et la flexibilit\u00e9 n\u00e9cessaires, r\u00e9sistant \u00e0 la d\u00e9formation, \u00e0 la fissuration et \u00e0 la fusion. Les raccords en PPR garantissent des performances constantes dans les applications d&#039;eau chaude et \u00e0 haute temp\u00e9rature. De plus, la r\u00e9sistance du PPR \u00e0 la d\u00e9gradation thermique am\u00e9liore sa stabilit\u00e9 \u00e0 haute temp\u00e9rature. Le mat\u00e9riau ne subit pas de modifications chimiques significatives lorsqu&#039;il est expos\u00e9 \u00e0 la chaleur, ce qui pr\u00e9vient sa fragilisation au fil du temps. Cette caract\u00e9ristique permet aux raccords en PPR de supporter une exposition continue \u00e0 l&#039;eau chaude, ce qui les rend adapt\u00e9s \u00e0 une utilisation \u00e0 long terme dans des syst\u00e8mes fiables et durables.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-thermal-expansion\">Dilatation thermique<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">La dilatation thermique est une pr\u00e9occupation courante dans les applications \u00e0 haute temp\u00e9rature, car les mat\u00e9riaux se dilatent souvent sous l&#039;effet de la chaleur. Les raccords PPR, quant \u00e0 eux, g\u00e8rent efficacement la dilatation thermique gr\u00e2ce \u00e0 leur flexibilit\u00e9 inh\u00e9rente. Ce mat\u00e9riau permet une dilatation et une contraction contr\u00f4l\u00e9es sans compromettre l&#039;int\u00e9grit\u00e9 du syst\u00e8me de tuyauterie. Cette flexibilit\u00e9 emp\u00eache l&#039;accumulation de contraintes dans les tuyaux et les raccords, r\u00e9duisant ainsi le risque de fuites ou de d\u00e9faillances.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Des techniques d&#039;installation appropri\u00e9es am\u00e9liorent encore la capacit\u00e9 des raccords PPR \u00e0 g\u00e9rer la dilatation thermique. Les plombiers int\u00e8grent souvent des boucles de dilatation ou des compensateurs au syst\u00e8me de tuyauterie, qui absorbent les variations de longueur dues aux fluctuations de temp\u00e9rature. Ces \u00e9l\u00e9ments de conception, combin\u00e9s aux propri\u00e9t\u00e9s naturelles du PPR, pr\u00e9servent la stabilit\u00e9 et les performances du syst\u00e8me, m\u00eame dans des environnements soumis \u00e0 d&#039;importantes variations de temp\u00e9rature.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-resistance-to-high-temperatures\">R\u00e9sistance aux temp\u00e9ratures \u00e9lev\u00e9es<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Les raccords PPR excellent dans les environnements \u00e0 temp\u00e9ratures \u00e9lev\u00e9es. Le mat\u00e9riau reste stable jusqu&#039;\u00e0 95 \u00b0C (203 \u00b0F), ce qui le rend adapt\u00e9 aux syst\u00e8mes d&#039;alimentation en eau chaude, notamment ceux des environnements r\u00e9sidentiels, commerciaux et industriels. M\u00eame expos\u00e9s \u00e0 des temp\u00e9ratures proches de cette limite sup\u00e9rieure, les raccords PPR conservent leur int\u00e9grit\u00e9 structurelle et continuent de fonctionner de mani\u00e8re fiable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Compar\u00e9 \u00e0 d&#039;autres mat\u00e9riaux, comme le PVC ou le CPVC, le PPR pr\u00e9sente une r\u00e9sistance sup\u00e9rieure aux hautes temp\u00e9ratures. Le PVC, par exemple, commence \u00e0 ramollir \u00e0 des temp\u00e9ratures autour de 60 \u00b0C (140 \u00b0F), tandis que le CPVC peut supporter jusqu&#039;\u00e0 93 \u00b0C (200 \u00b0F). La capacit\u00e9 du PPR \u00e0 fonctionner \u00e0 des temp\u00e9ratures l\u00e9g\u00e8rement sup\u00e9rieures sans se d\u00e9former ni perdre de sa r\u00e9sistance constitue un avantage pour les applications impliquant de l&#039;eau chaude ou de la vapeur.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-durability-in-hot-water-systems\">Durabilit\u00e9 des syst\u00e8mes d&#039;eau chaude<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Les syst\u00e8mes d&#039;eau chaude sollicitent fortement les mat\u00e9riaux de plomberie en raison de leur exposition continue \u00e0 des temp\u00e9ratures \u00e9lev\u00e9es. Les raccords en PPR rel\u00e8vent ce d\u00e9fi en offrant une durabilit\u00e9 \u00e0 long terme dans ces environnements. Ce mat\u00e9riau r\u00e9siste \u00e0 la d\u00e9gradation qui se produit souvent sur d&#039;autres plastiques lorsqu&#039;ils sont expos\u00e9s \u00e0 l&#039;eau chaude pendant de longues p\u00e9riodes. Cette r\u00e9sistance garantit que les raccords ne subissent pas de fissures sous contrainte, d&#039;entartrage ou d&#039;autres dommages susceptibles de compromettre les performances du syst\u00e8me.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L&#039;utilisation des raccords PPR dans les syst\u00e8mes d&#039;eau chaude ne se limite pas aux applications r\u00e9sidentielles. Les proc\u00e9d\u00e9s industriels impliquant le transfert de liquides chauds ou de vapeur b\u00e9n\u00e9ficient \u00e9galement de la r\u00e9sistance aux hautes temp\u00e9ratures du PPR. Dans ces environnements, la capacit\u00e9 du mat\u00e9riau \u00e0 conserver ses propri\u00e9t\u00e9s malgr\u00e9 une exposition continue \u00e0 la chaleur garantit un fonctionnement s\u00fbr et efficace du syst\u00e8me. La r\u00e9duction du risque de d\u00e9faillance minimise les temps d&#039;arr\u00eat et les co\u00fbts de maintenance, faisant du PPR une solution \u00e9conomique pour les industries exigeant des performances fiables \u00e0 haute temp\u00e9rature.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-chemical-resistance-at-high-temperatures\">R\u00e9sistance chimique \u00e0 haute temp\u00e9rature<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Les environnements \u00e0 haute temp\u00e9rature impliquent souvent la pr\u00e9sence de produits chimiques agressifs, susceptibles d&#039;amplifier les contraintes sur les mat\u00e9riaux de plomberie. Les raccords en PPR, quant \u00e0 eux, pr\u00e9sentent une excellente r\u00e9sistance chimique, m\u00eame \u00e0 des temp\u00e9ratures \u00e9lev\u00e9es. Ce mat\u00e9riau r\u00e9siste \u00e0 la corrosion, \u00e0 l&#039;entartrage et \u00e0 la d\u00e9gradation chimique, garantissant ainsi la fonctionnalit\u00e9 \u00e0 long terme du syst\u00e8me de tuyauterie.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dans les applications industrielles o\u00f9 des produits chimiques tels que les acides, les bases et les solvants sont fr\u00e9quemment utilis\u00e9s, la combinaison de leur r\u00e9sistance aux hautes temp\u00e9ratures et de leur stabilit\u00e9 chimique fait des raccords PPR un choix privil\u00e9gi\u00e9. Ces raccords supportent \u00e0 la fois la chaleur et l&#039;exposition aux produits chimiques sans subir de dommages, ce qui prolonge la dur\u00e9e de vie du syst\u00e8me et r\u00e9duit les remplacements fr\u00e9quents.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-insulation-properties\">Propri\u00e9t\u00e9s d&#039;isolation<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Les propri\u00e9t\u00e9s isolantes du PPR contribuent \u00e0 sa r\u00e9sistance aux hautes temp\u00e9ratures. Les raccords en PPR pr\u00e9sentent une faible conductivit\u00e9 thermique, ce qui r\u00e9duit les pertes de chaleur dans les syst\u00e8mes d&#039;eau chaude. Cette capacit\u00e9 d&#039;isolation garantit que l&#039;eau maintient la temp\u00e9rature souhait\u00e9e tout au long de son parcours dans la tuyauterie, am\u00e9liorant ainsi l&#039;efficacit\u00e9 \u00e9nerg\u00e9tique et r\u00e9duisant le besoin de chauffage suppl\u00e9mentaire.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Outre le maintien de la temp\u00e9rature de l&#039;eau, les propri\u00e9t\u00e9s isolantes des raccords PPR prot\u00e8gent \u00e9galement l&#039;environnement. Ils minimisent le risque de transfert de chaleur vers les murs, les sols ou autres mat\u00e9riaux de construction, pr\u00e9venant ainsi tout dommage ou inconfort potentiel. Cette caract\u00e9ristique permet aux raccords PPR de s&#039;installer dans divers environnements, y compris ceux o\u00f9 le contr\u00f4le de la temp\u00e9rature est crucial.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-cost-efficiency-and-longevity\">Rentabilit\u00e9 et long\u00e9vit\u00e9<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">La r\u00e9sistance aux hautes temp\u00e9ratures des raccords PPR offre des avantages \u00e9conomiques significatifs \u00e0 long terme. En pr\u00e9venant les dommages et la d\u00e9gradation des syst\u00e8mes d&#039;eau chaude, les raccords PPR r\u00e9duisent la fr\u00e9quence des op\u00e9rations d&#039;entretien et de r\u00e9paration. La durabilit\u00e9 du mat\u00e9riau garantit le bon fonctionnement du syst\u00e8me pendant de nombreuses ann\u00e9es, r\u00e9duisant ainsi le co\u00fbt global de possession.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">De plus, l&#039;installation des raccords PPR est simple et ne n\u00e9cessite aucun outil ni technique sp\u00e9cifique. Le proc\u00e9d\u00e9 de soudage par fusion, couramment utilis\u00e9 pour les installations PPR, cr\u00e9e une connexion homog\u00e8ne et \u00e9tanche entre les tuyaux et les raccords. Cette m\u00e9thode garantit une liaison durable qui r\u00e9siste aux contraintes des environnements \u00e0 haute temp\u00e9rature, contribuant ainsi \u00e0 la long\u00e9vit\u00e9 du syst\u00e8me.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gr\u00e2ce \u00e0 leur faible entretien, leur facilit\u00e9 d&#039;installation et leur longue dur\u00e9e de vie, les raccords PPR constituent une solution \u00e9conomique pour les applications r\u00e9sidentielles et industrielles. Les propri\u00e9taires et les gestionnaires d&#039;installations b\u00e9n\u00e9ficient ainsi d&#039;un syst\u00e8me de plomberie fiable et durable, sans frais excessifs.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-applications-in-high-temperature-environments\">Applications dans les environnements \u00e0 haute temp\u00e9rature<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Les raccords PPR sont utilis\u00e9s dans de nombreuses applications soumises \u00e0 des temp\u00e9ratures \u00e9lev\u00e9es. Dans les b\u00e2timents r\u00e9sidentiels, ils sont couramment install\u00e9s dans les syst\u00e8mes d&#039;alimentation en eau chaude, notamment ceux raccord\u00e9s aux chaudi\u00e8res, chauffe-eau et syst\u00e8mes de chauffage radiant. La capacit\u00e9 du PPR \u00e0 supporter des temp\u00e9ratures allant jusqu&#039;\u00e0 95 \u00b0C garantit une distribution d&#039;eau chaude efficace et s\u00fbre.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dans les environnements commerciaux et industriels, les raccords PPR sont utilis\u00e9s dans les syst\u00e8mes n\u00e9cessitant le transport de liquides chauds, de vapeur ou de produits chimiques. Ces applications incluent les syst\u00e8mes de chauffage, les tuyauteries industrielles et les syst\u00e8mes de manutention de produits chimiques. La r\u00e9sistance du mat\u00e9riau \u00e0 la chaleur et aux produits chimiques en fait un choix fiable pour les industries exigeant des performances \u00e9lev\u00e9es dans des conditions difficiles.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-environmental-impact\">Impact environnemental<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Leurs avantages environnementaux vont au-del\u00e0 de leur r\u00e9sistance aux hautes temp\u00e9ratures. Le PPR est un mat\u00e9riau recyclable, ce qui r\u00e9duit son empreinte environnementale. En fin de vie, les raccords en PPR peuvent \u00eatre collect\u00e9s et transform\u00e9s en nouveaux produits, minimisant ainsi les d\u00e9chets et pr\u00e9servant les ressources.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Leur durabilit\u00e9 et leur longue dur\u00e9e de vie contribuent \u00e9galement \u00e0 la durabilit\u00e9 environnementale. En r\u00e9duisant les remplacements fr\u00e9quents, les raccords PPR contribuent \u00e0 \u00e9conomiser les mati\u00e8res premi\u00e8res et l&#039;\u00e9nergie, ce qui s&#039;inscrit dans des objectifs environnementaux plus larges. De plus, la r\u00e9sistance du mat\u00e9riau \u00e0 la corrosion et \u00e0 la d\u00e9gradation chimique garantit qu&#039;il ne lib\u00e8re pas de substances nocives dans l&#039;environnement au fil du temps.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-ifan-ppr-pipe-fittings-international-standard\">Norme internationale IFAN pour les raccords de tuyauterie PPR<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Les produits PPR d&#039;IFAN sont conformes \u00e0 un large \u00e9ventail de normes internationales, garantissant une qualit\u00e9 irr\u00e9prochable et des performances fiables. Ces normes incluent les s\u00e9ries ISO 15874, EN 15874, ASTM F2389, DIN 8077\/8078, GB\/T 18742 et NBR 15884. La conformit\u00e9 \u00e0 ces normes rigoureuses garantit que les raccords et tuyaux PPR d&#039;IFAN r\u00e9pondent aux exigences mondiales en mati\u00e8re de s\u00e9curit\u00e9, de durabilit\u00e9 et d&#039;efficacit\u00e9 des syst\u00e8mes d&#039;approvisionnement en eau. Qu&#039;ils soient destin\u00e9s \u00e0 des applications r\u00e9sidentielles, commerciales ou industrielles, les produits PPR d&#039;IFAN offrent des solutions fiables dans diverses r\u00e9gions et r\u00e9glementations.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-conclusion\">Conclusion<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">La r\u00e9sistance aux hautes temp\u00e9ratures des raccords PPR en fait un choix id\u00e9al pour une large gamme d&#039;applications de plomberie. La composition unique du mat\u00e9riau, sa flexibilit\u00e9 et sa stabilit\u00e9 \u00e0 haute temp\u00e9rature garantissent sa capacit\u00e9 \u00e0 r\u00e9pondre aux exigences des syst\u00e8mes d&#039;eau chaude et des proc\u00e9d\u00e9s industriels. R\u00e9sistants \u00e0 la dilatation thermique, \u00e0 la d\u00e9gradation chimique et \u00e0 la fissuration sous contrainte, les raccords PPR offrent durabilit\u00e9 et fiabilit\u00e9 \u00e0 long terme, r\u00e9duisant les co\u00fbts de maintenance et prolongeant la dur\u00e9e de vie des syst\u00e8mes de plomberie. Leur facilit\u00e9 d&#039;installation, leur rentabilit\u00e9 et leurs avantages environnementaux renforcent leur attrait, faisant des raccords PPR une solution privil\u00e9gi\u00e9e pour les projets r\u00e9sidentiels et commerciaux.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-contact\">Contact<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/ifanplus.com\/fr\">IFAN <\/a>Fort de 30 ans d&#039;exp\u00e9rience, nous sommes un fabricant professionnel de tuyaux, raccords et vannes en plastique de haute qualit\u00e9. Nos produits comprennent des vannes en laiton, des vannes en PPR, ainsi que divers tuyaux et raccords pour r\u00e9pondre aux diff\u00e9rents besoins de nos clients. Que vous ayez besoin de tuyaux de plomberie et d&#039;\u00e9vacuation ou de vannes, <a href=\"https:\/\/ifanplus.com\/fr\">IFAN <\/a>Nous proposons une gamme diversifi\u00e9e de produits de haute qualit\u00e9 et \u00e9conomiques pour soutenir vos projets. Vous trouverez ci-dessous nos coordonn\u00e9es.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nous r\u00e9pondrons \u00e0 votre e-mail ou fax dans les 24 heures.<br>Vous pouvez nous appeler \u00e0 tout moment si vous avez des questions sur notre production.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour plus d&#039;informations, veuillez visiter notre site Web&nbsp;<a href=\"https:\/\/ifanplus.com\/fr\">https:\/\/www.ifanplus.com\/<\/a><br>Veuillez envoyer un mail \u00e0 :&nbsp;<a href=\"mailto:jack@ifangroup.com\">jack@ifangroup.com<\/a><br><a href=\"https:\/\/api.whatsapp.com\/send?phone=https:\/\/api.whatsapp.com\/send?l=en&amp;phone=8619857948982\">WhatsApp : + 86 19857948982<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>PPR (Polypropylene Random Copolymer) fittings have gained widespread popularity in plumbing systems due to their impressive durability, chemical resistance, and ease of installation. Among the many benefits of PPR fittings, their ability to withstand high temperatures stands out as a critical factor. This feature ensures their performance in environments where temperatures can reach extreme levels, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":19461,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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":"","ast-breadcrumbs-content":"","ast-featured-img":"","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":"set","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":""},"categories":[13],"tags":[265,215,266,216,267,269],"class_list":["post-19460","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-ppr-fitting","tag-ppr-fittings","tag-ppr-pipe-fitting","tag-ppr-pipe-fittings","tag-ppr-plumbing-fitting","tag-ppr-tube-fitting"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.7 (Yoast SEO v27.9) - 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