韶關消防涂(tu)(tu)(tu)(tu)塑鋼(gang)(gang)管(guan)(guan)(guan)彎(wan)(wan)曲試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan) DN≤50mm的(de)(de)(de)(de)(de)(de)涂(tu)(tu)(tu)(tu)覆(fu)鋼(gang)(gang)管(guan)(guan)(guan)進(jin)行(xing)彎(wan)(wan)曲試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)。管(guan)(guan)(guan)段(duan)(duan)試(shi)(shi)(shi)(shi)(shi)(shi)件長度(du)為(wei)(wei)(wei)(1200±100) mm。 在(zai)溫(wen)度(du)為(wei)(wei)(wei)（20±5） ℃的(de)(de)(de)(de)(de)(de)環(huan)境下，以鋼(gang)(gang)管(guan)(guan)(guan)公(gong)稱通徑(jing)的(de)(de)(de)(de)(de)(de)8倍為(wei)(wei)(wei)曲率半徑(jing)，彎(wan)(wan)曲角度(du)為(wei)(wei)(wei)30o，在(zai)彎(wan)(wan)管(guan)(guan)(guan)機(ji)(ji)或模具上(shang)進(jin)行(xing)彎(wan)(wan)曲。彎(wan)(wan)曲試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)時管(guan)(guan)(guan)內(nei)(nei)不帶填(tian)充物(wu)，焊縫(feng)位(wei)于(yu)彎(wan)(wan)曲主(zhu)面的(de)(de)(de)(de)(de)(de)側面。 試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)后，從(cong)彎(wan)(wan)曲圓弧的(de)(de)(de)(de)(de)(de)中部將(jiang)試(shi)(shi)(shi)(shi)(shi)(shi)件剖開，檢(jian)(jian)查內(nei)(nei)涂(tu)(tu)(tu)(tu)層(ceng)，試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)結(jie)(jie)果(guo)應符(fu)合5.7的(de)(de)(de)(de)(de)(de)規定(ding)。 壓扁(bian)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan) DN＞50 mm的(de)(de)(de)(de)(de)(de)涂(tu)(tu)(tu)(tu)覆(fu)鋼(gang)(gang)管(guan)(guan)(guan)進(jin)行(xing)壓扁(bian)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)。管(guan)(guan)(guan)段(duan)(duan)試(shi)(shi)(shi)(shi)(shi)(shi)件尺寸長為(wei)(wei)(wei)（50±10） mm。 在(zai)溫(wen)度(du)為(wei)(wei)(wei)（20±5） ℃的(de)(de)(de)(de)(de)(de)環(huan)境下，將(jiang)試(shi)(shi)(shi)(shi)(shi)(shi)件置于(yu)兩平板之(zhi)間(jian)，在(zai)壓力試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)機(ji)(ji)上(shang)逐漸(jian)壓縮至兩平板間(jian)距離(li)為(wei)(wei)(wei)試(shi)(shi)(shi)(shi)(shi)(shi)件外徑(jing)的(de)(de)(de)(de)(de)(de)五分之(zhi)四，壓扁(bian)時涂(tu)(tu)(tu)(tu)覆(fu)鋼(gang)(gang)管(guan)(guan)(guan)焊縫(feng)垂直于(yu)載(zai)荷(he)施加(jia)方向。試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)后，檢(jian)(jian)查內(nei)(nei)涂(tu)(tu)(tu)(tu)層(ceng)，試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)結(jie)(jie)果(guo)應符(fu)合5.8的(de)(de)(de)(de)(de)(de)規定(ding)。 壓扁(bian)試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan) 沖(chong)(chong)擊試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan) 從(cong)涂(tu)(tu)(tu)(tu)覆(fu)鋼(gang)(gang)管(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)任意位(wei)置切取長約100 mm的(de)(de)(de)(de)(de)(de)試(shi)(shi)(shi)(shi)(shi)(shi)樣，在(zai)溫(wen)度(du)為(wei)(wei)(wei)（20±5） ℃的(de)(de)(de)(de)(de)(de)環(huan)境下，按表(biao)2的(de)(de)(de)(de)(de)(de)規定(ding)進(jin)行(xing)沖(chong)(chong)擊試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)，觀察內(nei)(nei)涂(tu)(tu)(tu)(tu)層(ceng)的(de)(de)(de)(de)(de)(de)損壞情況。試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)時，焊縫(feng)應在(zai)沖(chong)(chong)擊面相反(fan)的(de)(de)(de)(de)(de)(de)方向，試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)結(jie)(jie)果(guo)應符(fu)合5.9的(de)(de)(de)(de)(de)(de)規定(ding)。 表(biao)2 沖(chong)(chong)擊試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)條件 公(gong)稱通徑(jing) DN mm錘(chui)重，kg落下高(gao)度(du)，mm 15～251.0300 32～502.1500 65 80～3006.31000 沖(chong)(chong)擊試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)裝置 真空試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan) 管(guan)(guan)(guan)段(duan)(duan)試(shi)(shi)(shi)(shi)(shi)(shi)件長度(du)為(wei)(wei)(wei)（500±50） mm使(shi)用(yong)適當(dang)的(de)(de)(de)(de)(de)(de)措施堵住(zhu)管(guan)(guan)(guan)道進(jin)出(chu)口，從(cong)進(jin)口逐漸(jian)增加(jia)負(fu)壓至660 mm汞(gong)柱，保持1 min試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)后檢(jian)(jian)查內(nei)(nei)涂(tu)(tu)(tu)(tu)層(ceng)，試(shi)(shi)(shi)(shi)(shi)(shi)驗(yan)(yan)(yan)(yan)結(jie)(jie)果(guo)應符(fu)合5.10的(de)(de)(de)(de)(de)(de)規定(ding)。

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