Tianjin Brisk Metalwork Co., Ltd. yog ib qho ntawm cov ua lag luam thiab cov neeg muag khoom ntawm hdg deg tiav square hollow seem hauv Suav teb. Peb muaj lub ntiaj teb- cov cuab yeej tsim khoom thiab muaj peev xwm tsim tau zoo. Thov koj xav tias dawb mus yuav bulk check hdg nto tiav square hollow seem los ntawm peb lub hoobkas.
Tianjin Brisk Steel yog ib qho ntawm cov tuam ntxhab ntawm HDG Surface Finish Square Hollow Section hauv Suav teb. Peb cov khoom raug xa tawm mus rau Middle East, Southeast Asia, Europe, New Zealand, thiab lwm thaj chaw.Yog tias koj xav paub ntau ntxiv txog peb cov khoom, thov hu rau peb thiab xa koj daim ntawv yuav khoom.
KHOOM
Tianjin Brisk Steeltsom rau cov khoom tsim thiab muab cov seem hollow thiab steel yeeb nkab
Product Txhais & Txheej txheem cej luam
A Kub-Dipped Galvanized (HDG) Nto Finish Square Hollow Section (SHS)yog txias-tsim los yog kub- tiav welded structural steel raj nrog square cross-section, uas tau undergone ib tug ncej-fabrication kub-dip galvanization txheej txheem. Tsis zoo li ua ntej -galvanized profiles (qhov twg steel sawb yog coated ua ntej yob- sib sau thiab vuam), qhov tseeb HDG hollow seem yog immersed kiag li nyob rau hauv ib tug molten zinc da dej tom qab lub mechanical forming thiab vuam txheej txheem tiav.
Qhov kev sib xyaw ua ke ntawm metallurgical no ua rau muaj kev sib txuas ntxiv, ntau- txheej zinc- hlau alloy txheej uas npog ob sab nrauv thiab sab hauv, nrog rau thaj tsam weld seam tseem ceeb. Cov yam ntxwv los ntawm kev sib tw torsional rigidity, siab zog- rau- qhov hnyav piv, thiab qhov tsis sib xws ntawm huab cua corrosion tsis kam, HDG square hollow seem sawv cev rau qhov kev xaiv zoo tshaj rau kev thauj khoom-cov ntaub ntawv cov kabmob uas raug corrosive, sab nraum zoov, lossis kev lag luam ib puag ncig.
Core Technological Advantages & Production Process
Txheej Txheem Yeeb Nkab Fabrication Phase
- High-Precision Cold Roll Forming:Premium kub- dov carbon steel coils yog slit thiab incrementally dhau los ntawm ib tug series ntawm kev loj hlob rollers los ua ib tug meej square profile.
- High-Frequency Induction (HFI) Vuam:Cov npoo ntev yog fused siv cov khoom siv - xeev siab - zaus induction tam sim no yam tsis muaj kev qhia txog cov hlau muab tub lim, ua kom muaj qhov sib npaug ntawm qhov sib txuas uas sib npaug ntawm niam txiv lub zog.
- Online Weld Seam Annealing:Cov hlaws hlaws tau txais kev kho cua sov hauv zos kom normalize cov qauv nplej, tshem tawm cov theem martensitic nkig.
Advanced Kub-Dip Galvanizing Cycle (ASTM A123 Ua raws)
- Caustic Degreasing:Heavy organic contaminants, milling oils, thiab deg lubricants yog chemically tshem tawm nyob rau hauv ib tug kub alkaline da dej.
- Hydrochloric Acid Pickling:Cov seem yog submerged nyob rau hauv ib qho inhibited HCl tov kom tshem tawm zeb nplai thiab hlau oxides, nthuav tawm ib qho atomically huv hlau substrate.
- Rinsing & Fluxing:Cov dej huv huv yog ua raws li los ntawm kev tso rau hauv cov tshuaj kub zinc ammonium chloride flux. Qhov no tiv thaiv ua ntej -oxidation ua ntej nkag mus rau hauv zinc da dej thiab txhim kho lub peev xwm ntub dej ntawm cov hlau molten.
- Molten Zinc Submersion:Cov ntu hlau tau maj mam txo qis rau hauv cov ceramic-kab galvanizing kettle uas muaj 99.995% cov zinc molten ntshiab khaws cia ntawm 445℃txog 460℃. Lub immersion ceev thiab lub sij hawm nyob rau hauv yog precisely calibrated raws li phab ntsa thickness tso cai rau tag nrho cov tsim ntawm cov zinc sib txawv - hlau alloy txheej (Gamma, Delta, Zeta) topped los ntawm ib tug ntshiab zinc sab nrauv txheej (Eta).
- Tswj Quenching & Passivation:Cov raj raug tshem tawm thiab ruaj khov tam sim ntawm dej quenching, ua raws li chromate - tsis muaj tshuaj lom neeg kev kho mob los tiv thaiv kev tsim cov ntub dej - stain stain (dawb xeb) thaum caij nkoj hiav txwv.
International Manufacturing Standards & Steel Qib
Kev ua raws li kev cai lij choj thoob ntiaj teb nruj tswj xyuas kom ntseeg tau tias peb cov square hollow seem muaj cov cuab yeej siv tau zoo, qhov tseeb qhov ntev, thiab cov tshuaj sib xyaw ua ke. Peb tsim thiab muab cov khoom raws li cov qauv hauv qab no thoob ntiaj teb:
ASTM Standards (North America)
- ASTM A500 / A500M:Standard Specification for Txias-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes.
Hom Qib:Qib A, Qib B (feem ntau tau teev tseg rau cov qauv tsim), Qib C (siab dua tensile thiab yield zog).
- ASTM A123 / A123M / ASTM A123 / ASTM A123 / ASTM A123 / ASTM A123 / ASTM A123 / A123M / ASTM A123 / A123M / ASTM A123 / A123M / ASTM A123 / A123M / ASTM A123 / A123M / ASTM A123 / A123M / ASTM A123 / A123M / ASTM A123M / ASTM A123M / ASTM A123M / ASTM A123M / ASTM A123M / ASTM A123)Tus txheej txheem tswj hwm kub -dip galvanizing txheej txheem nws tus kheej, tswj qhov tsawg kawg nkaus txheej thicknesses raws li cov khoom hnyav.
EN Standards (Tebchaws Europe & International)
- TS EN 10219-1 & 2:Txias-tsim welded structural hollow seem ntawm tsis yog- alloy thiab nplua- nplej hlau.
Hom Qib:S235JRH, S275J0H, S275J2H, S355J0H, S355J2H (qib hwm zoo muab lub zog muaj zog ntawm sub- xoom kub).
- TS EN 10210-1 & 2:Kub-ua tiav cov qauv hollow seem. Txaus siab rau dynamic load-cov qauv bearing vim yog qhov tsawg kawg nkaus kev ntxhov siab.
Hom Qib:S355NH, S355NLH.
AS/NZS Standards (Oceania)
- AS/NZS 1163:Cov qauv steel hollow seem tau siv dav thoob tebchaws Australia thiab New Zealand.
Hom Qib:C250L0, C350L0, C450L0 (ultra-siab- lub zog tsim qauv).
Hais txog Kev Lag Luam Mob Cov Ntsiab Lus: HDG Resolution
Cov neeg tswj xyuas kev yuav khoom thoob ntiaj teb ntsib qhov teeb meem tseem ceeb ntawm cov txheej txheem tsis ua haujlwm thiab kev lag luam poob vim qhov tsis zoo ntawm cov qauv steel tubing. Hauv qab no yog li cas peb cov khoom lag luam HDG daws qhov kev lag luam cov ntsiab lus mob siab tshaj plaws:
| Kev Muag Khoom & Engineering Pain Point | Lub Pre-Galvanized / Painted Failure Mode | Qhov Tseeb HDG Solution |
| Internal Corrosion & Premature Rusting | Moisture condenses nyob rau hauv hollow profiles. Ua ntej-galvanized tubes tawm hauv qhov sib txuas sab hauv raug nthuav tawm, ua rau muaj qhov zais oxidation thiab kev puas tsuaj loj ntawm cov txheej txheem sab hauv. | Tag nrho Immersion Txheej:Cov zinc molten ntws seamlessly los ntawm sab hauv ntawm lub raj, tsim kom muaj kev tiv thaiv zoo ib yam ntawm cov phab ntsa sab hauv thiab tshem tawm cov kab mob hauv zos galvanic. |
| Micro-Kev tawg & kev nyuaj siab tawg | Cov kev ntxhov siab uas tshwm sim los ntawm kev mob khaub thuas hnyav heev - ua, ua ke nrog qis - qib vuam, ua rau micro- fissures raws qhov ntev weld thaum lub sij hawm hnyav hnyav. | Thermal Stress Relief:Lub 450℃molten zinc da dej ua raws li ib feem ntawm kev ntxhov siab-relieving heat treatment, stabilizing microcrystalline structure of the cold-ua steel. |
| High Maintenance & Txheej Delamination | Organic coatings, primers, thiab barrier paints degrade nyob rau hauv intensive ultraviolet (UV) hluav taws xob, yuav tsum recoating txhua txhua 3 mus rau 5 xyoos. | Metallurgical Interfacial Bond:Cov zinc chemically reacts nrog cov hlau substratum, tsim ib qho abrasion -cov hlau alloy txheej uas tsis tuaj yeem tev, flake, los yog delaminate nyob rau hauv UV lossis txhua yam cuam tshuam. |
| Ntug & Pob Tawb Khoom Thinning | Thaum lub sij hawm tshuaj tsuag- pleev xim los yog hmoov txheej, nto nro ua rau cov txheej txheem rub tawm ntawm lub kaum ntse ntse 90 degree, ua rau lawv tsis muaj zog. | Corner Thickness Txhim Kho:Qhov kub -dip tshuaj tiv thaiv ib txwm tso ib qho sib npaug lossis me ntsis tuab zinc txheej rau sab nrauv radii, txhawb cov cheeb tsam geometric tseem ceeb tshaj plaws. |
Comprehensive Dimensional & Technical Specifications
| Technical Parameters | Specification Range & Tolerances | Engineering Compliance & Notes |
|
Sab nraud Diameter (OD) |
20mm × 20mm mus rau 500mm × 500mm |
± 0.5% ntawm nominal dimension. |
|
Phab ntsa Thickness (WT) |
1.3mm txog 40.0mm | ± 5.0% mus rau ± 10.0% siab tshaj qhov sib txawv nyob ntawm tus qauv chav kawm. |
|
Ntev Tolerances |
Standard Tshuag: 5.8m, 6.0m, 11.8m, 12.0m Kev Cai Txiav: Hauv ± 2.0mm |
5.8m thiab 11.8m yog qhov zoo tshaj plaws rau tus qauv 20ft / 40ft maritime thawv shipping. |
|
Zinc Txheej Mass / Thickness |
Kub dip galvanizing raj ＞ 35μm Pre galvanized raj 20-30 g / m2 |
Ua tiav raws li ASTM A123 / EN ISO 1461 cov lus qhia tshwj xeeb rau kev ua phem corrosion ib puag ncig. |
|
Squareness ntawm Sab |
90℃± 0.5 degree | Xyuas kom meej geometric alignment thaum lub sij hawm structural framing thiab siab -load haum-ups. |
|
Kev ncaj |
Tsawg dua lossis sib npaug li 0.15% ntawm tag nrho cov raj ntev | Nws yog ib qho tseem ceeb rau kev txo qis cov qauv eccentric loading nyob rau hauv kab ntsug thiab ncej. |
Targeted Application Scenarios
Lub architectural symmetry thiab multidirectional structural tsis kam ntawm lub square hollow seem ua rau nws muaj ntau yam nyob rau hauv ntau yam ntiaj teb no sectors:
- Commercial Infrastructure & Building Frameworks:Thawj kab, trusses, qhov chaw thav duab, thiab kab hlau rhuav phab ntsa txhawb nqa rau tshav dav hlau, lub ru tsev chaw ntau pob, thiab siab - nce kev lag luam.
- Renewable Energy Systems:Hnyav-lub luag haujlwm siv hluav taws xob- teev hnub ci taug qab hauv av mounts, torque tubes, thiab cua turbine structural platforms raug rau huab cua tsis tu ncua.
- Industrial Machinery Fabrication:Rigid chassis, nyiaj siv ua haujlwm crane gantries, conveyor txhawb lub moj khaum, thiab cov khoom siv ua liaj ua teb platforms xav tau siab torsional kuj.
- Civil Engineering & Marine Infrastructure:Offshore service platforms, ntug hiav txwv kev nyab xeeb railings, txoj kev loj kos npe gantries, choj structural ntsiab, thiab chaw nres nkoj staging chaw.
Comparative Technical Analysis: Sourcing Selection Matrix
| Kev ntsuas ntsuas | True Post{0}}Fabrication HDG SHS | Ua ntej- Galvanized Steel SHS | Txheem Painted / Primer Carbon Steel SHS |
| Nruab nrab Zinc Txheej Thickness | 35-50μm | 15-20μm | 0μm (polymer txheej nkaus xwb) |
| Weld Seam Corrosive Tiv Thaiv | 100% Kev Tiv Thaiv Tag Nrho(Coated ncej-welding) | Vulnerable (Zinc burns tawm ntawm weld kab) | Kawm kom tiav cov xim tawg |
| Internal Surface Protection | Ua kom tiav Metallurgical Txheej | Tsawg heev / qis-qib txheej txheej | Tsis muaj kev tiv thaiv (High risk of internal rust) |
| Kev saib xyuas-Dawb Lifespan (C3 Ib puag ncig) | 50+ Xyoo | 10-15 Xyoos | 3-5 Xyoos (Yuav tsum tau pleev xim tas li) |
| Thawj Tus Nqi Them Nqi Them Nqi | Nruab nrab-High | Nruab nrab | Tsawg |
| Tus nqi tag nrho Lifecycle (LCC) | qis tshaj(zero txij nkawm ntawm lifecycle) | Nruab nrab-High | Siab tshaj (Cov nqi kho mob tsis txaus ntseeg) |
Cov lus nug nquag nug (FAQ)
Q: HDG square hollow seem puas tuaj yeem txuas ncaj qha rau ntawm -qhov chaw thaum lub sijhawm teeb tsa?
A: Yog, tab sis cov txheej txheem tshwj xeeb yuav tsum tau ua. Vuam los ntawm zinc txheej tso tawm zinc oxide fumes, uas tuaj yeem ua rau muaj kev phom sij rau kev noj qab haus huv (hlau fume fever) thiab qhia cov porosity rau hauv pas dej ua ke. Lub zinc txheej yuav tsum tau muab kho kom deb li deb li ntawm 25-50mm rov qab los ntawm thaj chaw weld ua ntej ua tiav qhov vuam. Thaum cov txheej txheem vuam raug lees paub, thaj chaw raug yuav tsum tau rov qab tam sim ntawd siv lub siab -zinc-plua plav primer uas muaj tsawg kawg yog 92% zinc ntshiab hauv cov yeeb yaj kiab qhuav, raws li ASTM A780.
Q: Dab tsi yog qhov kev sib txawv ntawm Pre-Galvanized SHS thiab qhov tseeb Kub-Dipped Galvanized Surface Finish SHS?
A:
Qhov tseem ceeb sib txawv yog nyob rau hauv ib theem zuj zus ntawm ntau lawm. Ua ntej- galvanized raj yog tsim los ntawm cov ntawv hlau uas twb tau galvanized ntawm lub tshuab steel. Thaum yob- tsim thiab siab- zaus welded rau hauv ib lub raj, zinc ntawm lub vuam seam raug kub hnyiab thiab yuav tsum tau kho cov tshuaj tsuag thib ob, uas ua rau nws yooj yim. Tsis tas li ntawd, pre-galvanized txheej yog nyias (15-20μm). Qhov tseeb HDG seem yog tsim los ntawm cov hlau dub thiab dipped rau hauv zinc moltentom qabtag nrho fabrication yog tiav. Qhov no yields ib tug ntau thicker (60-100μm), tag nrho nruam txheej hla lub weld seam thiab sab hauv qhov chaw, muab exponentially superior corrosion kuj.
Q: Koj yuav ua li cas tiv thaiv kev cuam tshuam ntawm cov qauv lossis kev sib tw ntawm qhov ntev square hollow seem thaum lub sij hawm siab -kub galvanizing txheej txheem?
A: Cov qauv kev cuam tshuam tshwm sim vim qhov tsis sib xws ntawm kev ntxhov siab ntawm qhov seem thaum cov hlau nkag mus rau 450℃zinc da dej. Peb txo qhov no los ntawm ob qho tib si engineering kev coj ua. Ua ntej, peb nruj me ntsis tswj peb cov yob- tsim cov kev txwv thiab muab cov kev xaiv hauv online ntawm cov cua sov- kev kho kom zoo kom txo qis hauv kev ntxhov siab ua ntej galvanizing. Thib ob, peb tsim cov kev cai sab hauv venting thiab cov kav dej. Qhov no tso cai rau cov zinc molten sau thiab ntws sai thaum lub sij hawm dipping, tiv thaiv tsis sib xws thermal gradients thoob plaws lub ntsej muag profile.
Q: Kuv yuav xaiv li cas ntawm ASTM A500 Qib B thiab EN 10219 S355J2H rau kev ua haujlwm txawv teb chaws?
A: Koj qhov kev xaiv feem ntau yog nyob ntawm koj tus qauv tsim qauv engineering (AISC vs. Eurocode) thiab cov qauv thauj khoom. ASTM A500 Qib B yog tus qauv kev xaiv thoob plaws North American tej yaam num, muab qhov tsawg kawg nkaus yield zog ntawm 317MPa (46ksi). Hauv qhov sib piv, EN 10219 S355J2H yog cov qauv zoo tshaj plaws uas tau teev tseg thoob plaws ntiaj teb, muab qhov siab tshaj qhov muaj zog ntawm 355MPa thiab lav Charpy cuam tshuam toughness ntawm sub- xoom kub (-20℃). Yog tias koj qhov project cuam tshuam nrog kev thauj khoom hnyav lossis huab cua khov, S355J2H muab cov qauv kev nyab xeeb zoo tshaj plaws thiab tuaj yeem tso cai rau txo cov phab ntsa tuab.
Cim npe nrov: hdg nto tiav square hollow seem, Tuam Tshoj hdg nto tiav square hollow seem manufacturers, lwm tus neeg, Hoobkas
