{"id":6086,"date":"2026-08-26T17:37:46","date_gmt":"2026-08-26T10:37:46","guid":{"rendered":"https:\/\/onggiosaoviet.vn\/?p=6086"},"modified":"2026-08-26T17:37:46","modified_gmt":"2026-08-26T10:37:46","slug":"cach-tinh-khoi-luong-ton-khi-gia-cong-ong-gio-cung-ong-gio-sao-viet","status":"publish","type":"post","link":"https:\/\/onggiosaoviet.vn\/en\/cach-tinh-khoi-luong-ton-khi-gia-cong-ong-gio-cung-ong-gio-sao-viet\/","title":{"rendered":"HOW TO CALCULATE THE VOLUME OF SHEET METAL WHEN FABRICATING AIR DUCTS WITH SAO VIET AIR DUCTS"},"content":{"rendered":"<figure class=\"wp-block-post-featured-image\"><img fetchpriority=\"high\" decoding=\"async\" width=\"2048\" height=\"1536\" src=\"https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/04\/Bai-20-T4.png\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"Van gi\u00f3 vu\u00f4ng v\u00e0 ph\u1ee5 ki\u1ec7n \u0111i\u1ec1u ch\u1ec9nh cho h\u1ec7 th\u1ed1ng th\u00f4ng gi\u00f3\" style=\"object-fit:cover;\" srcset=\"https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/04\/Bai-20-T4.png 2048w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/04\/Bai-20-T4-300x225.png 300w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/04\/Bai-20-T4-1024x768.png 1024w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/04\/Bai-20-T4-768x576.png 768w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/04\/Bai-20-T4-1536x1152.png 1536w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/04\/Bai-20-T4-16x12.png 16w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/04\/Bai-20-T4-600x450.png 600w\" sizes=\"(max-width: 2048px) 100vw, 2048px\" \/><\/figure>\n\n\n<p class=\"wp-block-paragraph\">During the cost estimation process, contractors often need to determine the volume of ductwork to calculate material costs. However, the finished area does not always reflect the total amount of material actually needed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Understanding how quantities are formed helps the QS and purchasing departments compare quotations between suppliers.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1. Factors affecting volume<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The basic mass depends on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pipe size.<\/li>\n\n\n\n<li>Length.<\/li>\n\n\n\n<li>Quantity.<\/li>\n\n\n\n<li>Thickness.<\/li>\n\n\n\n<li>Cross-sectional shape.<\/li>\n\n\n\n<li>Accessory.<\/li>\n\n\n\n<li>The seam edge.<\/li>\n\n\n\n<li>Reinforcement.<\/li>\n\n\n\n<li>Loss.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">2. What should be considered when using rectangular tubes?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/03\/Anh-1-Bai-12-1024x768.png\" alt=\"\" class=\"wp-image-5614\" srcset=\"https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/03\/Anh-1-Bai-12-1024x768.png 1024w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/03\/Anh-1-Bai-12-300x225.png 300w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/03\/Anh-1-Bai-12-768x576.png 768w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/03\/Anh-1-Bai-12-1536x1152.png 1536w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/03\/Anh-1-Bai-12-16x12.png 16w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/03\/Anh-1-Bai-12-600x450.png 600w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/03\/Anh-1-Bai-12.png 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">For a rectangular pipe, the basic surface area can be calculated by multiplying the perimeter of the cross-section by its length.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, when converting to actual material quantities, additional costs for processing and structural connections according to the production plan must be considered.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. Why might the two quotes be different?<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Element<\/strong><\/th><th><strong>Impact on price quotations<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Thickness<\/td><td>Amount of material<\/td><\/tr><tr><td>Type of roofing sheet<\/td><td>Raw material prices<\/td><\/tr><tr><td>flange\/trim<\/td><td>Accessory costs<\/td><\/tr><tr><td>Reinforcement<\/td><td>Material requirements<\/td><\/tr><tr><td>Loss<\/td><td>Production costs<\/td><\/tr><tr><td>Quantity<\/td><td>Production efficiency<\/td><\/tr><tr><td>Transport<\/td><td>Logistics costs<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">4. QS should not only compare prices per square meter.<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A low quoted price doesn&#039;t necessarily mean a low total cost.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Please check if the quoted price includes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Straight pipe.<\/li>\n\n\n\n<li>Coil\/butter.<\/li>\n\n\n\n<li>Numb.<\/li>\n\n\n\n<li>Change the cross-section.<\/li>\n\n\n\n<li>Flange\/trim.<\/li>\n\n\n\n<li>Valve.<\/li>\n\n\n\n<li>Accessory.<\/li>\n\n\n\n<li>Transport.<\/li>\n\n\n\n<li>Technical documentation.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">5. Sao Viet Air Ducting supports data from drawings.<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For large-scale projects, contractors should submit complete drawings or Bill of Quantities (BOQ) to <strong>Sao Viet Air Duct<\/strong> This allows for a thorough assessment of the scope of supply and the creation of realistic price quotations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This also helps to limit misunderstandings between the two parties regarding the scope of work.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Calculating the volume of ductwork is not only useful for quotations but also helps contractors control materials, project timelines, and costs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A good quote is one that includes <strong>Clear scope, clear specifications, and transparent terms of supply.<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SAO VIET AIR DUCT MANUFACTURING AND TRADING COMPANY LIMITED<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Address:<\/strong> 267 Le Thanh Tong, May Chai, Ngo Quyen, Hai Phong<\/li>\n\n\n\n<li><strong>Hotline:<\/strong> 0815.999.826 \u2013 0934.559.168<\/li>\n\n\n\n<li><strong>E-mail:<\/strong> vietonggio@gmail.com<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Sao Viet Air Duct<\/strong> We undertake fabrication and supply of ductwork and HVAC accessories according to project drawings and technical requirements. M&amp;E\/Fire Protection contractors can submit their orders. <strong>drawings, BOQ, or technical specifications<\/strong> To receive advice on suitable options and a price quote.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Trong qu\u00e1 tr\u00ecnh l\u1eadp d\u1ef1 to\u00e1n, nh\u00e0 th\u1ea7u th\u01b0\u1eddng ph\u1ea3i x\u00e1c \u0111\u1ecbnh kh\u1ed1i l\u01b0\u1ee3ng \u1ed1ng gi\u00f3 \u0111\u1ec3 t\u00ednh chi ph\u00ed v\u1eadt t\u01b0. Tuy nhi\u00ean, di\u1ec7n t\u00edch th\u00e0nh ph\u1ea9m kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng ph\u1ea3n \u00e1nh to\u00e0n b\u1ed9 l\u01b0\u1ee3ng v\u1eadt li\u1ec7u th\u1ef1c t\u1ebf c\u1ea7n s\u1eed d\u1ee5ng. Vi\u1ec7c hi\u1ec3u c\u00e1ch h\u00ecnh th\u00e0nh kh\u1ed1i l\u01b0\u1ee3ng gi\u00fap QS v\u00e0 [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":5855,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[456,453,457,458,193,133,311,455,454,389],"class_list":["post-6086","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc","tag-bao-gia-gia-cong-ong-gio","tag-boc-tach-ong-gio","tag-boq-ong-gio","tag-du-toan-hvac","tag-ong-gio-chong-chay","tag-ong-gio-hai-phong","tag-ong-gio-sao-viet-2","tag-qs-me","tag-tinh-khoi-luong-ton-ong-gio","tag-vat-tu-hvac"],"_links":{"self":[{"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/posts\/6086","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/comments?post=6086"}],"version-history":[{"count":1,"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/posts\/6086\/revisions"}],"predecessor-version":[{"id":6087,"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/posts\/6086\/revisions\/6087"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/media\/5855"}],"wp:attachment":[{"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/media?parent=6086"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/categories?post=6086"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/tags?post=6086"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}