Lub Yuantai Derun's square hollow seem, lub voj voos hollow seem, voj voog hollow seem, pre galvanized steel yeeb nkab, kub-dip galvanized steel yeeb nkab thiab lwm yam khoom nqa tawm EN10210, EN10219, ASTM A53, ASTM A500, ASTM A501, ASTM A107, JIS138 STKR400, JIS STKR490, GB / T700-2006, GB / T6728-2002;Ob chav sided submerged arc kauv steel yeeb nkab, thiab seamless steel yeeb nkab yuav tsum ua raws li GB / T9711-2011, API Spec 5L thiab API 5CT cov qauv ntawm Tuam Tshoj roj av kev lag luam.

Lub tuam txhab Yuantai tseem ceeb heev rau qhov zoo ntawm cov khoom, nqis peev ntau hauv kev qhia txog cov cuab yeej siv siab heev thiab cov kws tshaj lij, thiab tawm mus kom tau raws li qhov xav tau ntawm cov neeg siv khoom hauv tsev thiab txawv teb chaws.In 2023, Yuantai Derun pab pawg kuaj tau dhau CNAS ntawv pov thawj.

Cov hlau hollow seem kuaj cov ntsiab lus tuaj yeem muab faib ua: tshuaj lom neeg muaj pes tsawg leeg, lub zog tawm los, lub zog tensile, cov khoom cuam tshuam, thiab lwm yam.

Nyob rau tib lub sijhawm, lub tuam txhab tseem tuaj yeem ua tiav kev tshawb nrhiav qhov tsis zoo hauv online thiab annealing thiab lwm yam kev kho cua sov raws li cov neeg siv khoom xav tau.