表6-33不锈耐酸钢极薄壁不锈钢复合管桥梁护栏的尺寸规格 外径×壁厚/mm 10.3×0.15 12.4×0.20 15.4×0.20 18.4×0.20 24.0×0.20 24.4×0.20 26.4×0.20 32.4×0.20 35.0×0.50 40.4×0.20 40.6×0.30 41.0×0.50 41.2×0.60 48.0×0.25 50.5×0.25 53.2×0.60 55.0×0.50 59.6×0.30 60.0×0.25 60.0×0.50 61.0×0.35 61.0×0.50 61.2×0.60 67.6×0.30 67.8×0.40 70.2×0.60 74.0×0.50 75.5×0.25 75.6×0.30 82.8×0.40 83.0×0.50 89.6×0.30 89.8×0.40 90.2×0.40 90.5×0.25 90.7×0.30 90.8×0.40 95.6×0.30 101.0×0.50 102.6×0.30 110.9×0.45 125.7×0.35 150.×80.40 250.8×0.40 注:1.根据需方要求,经双方协议,可供应表中规定以外的其他尺寸规格钢管。 2.钢管通常长度为O.5-6m。(2)允许偏差见表6-34、表6-35。表6-34不锈耐酸钢极薄壁不锈钢复合管桥梁护栏的内径允许偏差直径/mm 普通级/mm 高级/mm 10~250 +O.05-O.10 ±O.05
表6-35不锈耐酸钢极薄壁不锈钢复合管桥梁护栏的壁厚允许偏差钢管尺寸/mm 壁厚允许偏差/mm 外径 壁厚 普通级 高 级 ≤60 ≤O.20 ±O.03 +O.03-O.Ol O.25 +0.04-O.03 +O.03-0.02 O.30 ±O.04 ±0.03 0.35 +O.05-O.04 +0.04-O.03 ≤60 0.40 ±O.05 ±O.04 O.50 ±0.06 +O.05-O.04 O.60 ±0.08 ±0.05 >60 ≤O.25 ±O.04 ±0.03 O.30 ±O.04 +0.04-O.03 O.35 ±O.05 ±0.04 0.40 ±O.05 +O.05-O.04 0.50 ±0.06 士O.05 O.60 ±O.08 ±O.05
注:钢管的每米弯曲度应不大于5mm。(3)牌号和化学成分见表6—36。表6-36不锈耐酸钢极薄壁不锈钢复合管桥梁护栏的牌号和化学成分牌 号 化学成分(质量分数)(%) C Si Mn S P Cr Ni Ti Mo 00Crl8NilO ≤O.03 ≤1.00 ≤2.00 ≤O.030 ≤O.035 17~19 8~12 1Crl8Ni9Ti ≤O.12 ≤1.00 ≤2.00 ≤O.030 ≤0.035 17~19 8~11 5(C%~0.02)~O.8 00Crl7Ni14M02 ≤O.03 ≤1.00 ≤2.00 ≤0.030 ≤0.035 16~18 12~16 l.8~2.5 1Crl8Nil2Mo2Ti ≤0.12 ≤1.00 ≤2.oo ≤0.030 ≤O.035 16~19 11~14 5(C%~0.02)~0.8 l.8~2.5 1Crl8Nil2M03Ti ≤O.12 ≤1.00 ≤2.00 ≤O.030 ≤0.035 16~19 11~14 5(C%~ O.02)~0.8 2.5~3.
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