一、方管及矩形管规格表，名称规格壁厚mm名称规格壁厚mm1.方管20*201.3-2.520*301.3-2.7525*251.3-2.7520*401.3-2.752.方管30*301.3-2.7525*401.3-2.7540*401.3-3.7530*501.3-4.753.方管50*501.3-5.7530*601.3-4.7560*601.3-5.7540*501.3-4.754.方管70*701.3-5.7540*801.3-4.7580*801.3-5.7550*701.3-4.755.方管90*901.3-5.7550*801.3-4.75100*1001.5-12.060*901.3-4.756.方管120*1202.5-12.050*1001.3-5.75140*1402.75-16.050*1501.3-5.757.方管150*1502.75-16.060*1601.3-5.75160*1603.0-16.0100*1502.5-16.08.方管180*1803.0-16.0100*2002.5-16.0200*2003.0-16.0100*2502.5-16.09.方管250*2504.75-16.0150*3004.5-16.0300*3004.75-16.0200*3005.5-16.010.方管400*4004.75-16.0200*4005.5-16.0500*5004.75-16.0400*6005.5-16.0方管是一种空心方形的截面轻型薄壁钢管，也称为钢制冷弯型材。它是以Q235热轧或冷轧带钢或卷板为母材经冷弯曲加工成型后再经高频焊接制成的方形截面形状尺寸的型钢。热轧特厚壁方管除壁厚增厚外情况,其角部尺寸和边部平直度均达到甚至超过电阻焊冷成型方管的水平。)