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		<h1>BẢNG QUY CÁCH THÉP ỐNG ĐÚC</h1>
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			<li>Thứ sáu - 13/12/2019 09:41</li>
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			Thép ống đúc được sử dụng rộng rãi trên toàn cầu. Làm thế nào để một nước sản xuất, nhưng nước khác vẫn lắp đặt bình thường???<br  />
Các nhà khoa học, các viện kỹ thuật, viện tiêu chuẩn đưa ra quy tắc chung cho bảng bazem thép ống<br  />
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			Chú thích<br  />
NPS: kích thước ống danh nghĩa (Normonal Pipes size): được đo theo inch, các nước Châu Âu, Bắc Mỹ hay dùng đơn vị này để đo đường kính ống<br  />
DN: Diameter Nominal&nbsp; các nước châu âu hay dùng tiêu chuẩn này để sản xuất phụ kiện, mặt bích, van...<br  />
OD: đường kính ngoài (outside diameter ) tính theo đơn vị mm. Các nước châu Á trong đó có VIệt Nam hay dùng đơn vị đo này
<div style="text-align:center"><img alt="bang quy cach thep ong duc" height="508" src="http://thepthuanthien.com/uploads/news/2019_12/bang-quy-cach-thep-ong-duc.jpg" width="1044" /></div>
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