Customized square tubes of various specifications
1. The allowable deviation of the wall thickness of square pipe shall not exceed plus or minus 10% of the nominal wall thickness when the wall thickness is not greater than 10mm, and plus or minus 8% of the wall thickness when the wall thickness is greater than 10mm, except for the wall thickness of corner and weld area.
2. The normal delivery length of square rectangular pipe is 4000mm-12000mm, mostly 6000mm and 12000mm. The rectangular tube is allowed to deliver short and non fixed length products not less than 2000mm, or in the form of interface tube, but the Demander shall cut off the interface tube when using it. The weight of short length and non fixed length products shall not exceed 5% of the total delivery volume, and for square moment tubes with theoretical weight greater than 20kg / m, it shall not exceed 10% of the total delivery volume.
3. The bending degree of square rectangular pipe shall not be greater than 2mm per meter, and the total bending degree shall not be greater than 0.2% of the total length
Application fields of square tube: it is widely used in machinery manufacturing, construction industry, metallurgical industry, agricultural vehicles, agricultural greenhouses, automobile industry, railway, highway guardrails, container skeleton, furniture, decoration and steel structure.
For engineering construction, glass curtain wall, door and window decoration, steel structure, guardrail, machinery manufacturing, automobile manufacturing, household appliance manufacturing, shipbuilding, container manufacturing, electric power, agricultural construction, agricultural greenhouse, bicycle frame, motorcycle frame, shelf, fitness equipment, leisure and tourism products, steel furniture, various specifications of oil casing, oil pipe and pipeline pipe, water, gas, sewage Air, heating and other fluid transportation, fire fighting and support, construction industry, etc.
GB / t6728-2002, GB / t6725-2002, gbt3094-2000, JG 178-2005, ASTM A500, JIS g3466, en10210 or technical agreement.
GB / t3094-2000 (national standard) cold pressed special-shaped rectangular pipe
GB / t6728-2002 (national standard) cold formed hollow section steel for structure
ASTM A500 (American Standard) carbon steel Cold-Formed Welded rectangular tubes and seamless rectangular tubes with round and special-shaped sections for structure
En10219-1-2006 (European standard) cold formed welded hollow structural sections of non alloy and fine grain
JIS g 3466 (Japanese standard) angular rectangular pipe for general construction