黄色三级片视频

天津無縫鋼管廠生產出的產品按用(yong)(yong)途分類(lei)--管(guan)(guan)道(dao)用(yong)(yong)鋼(gang)管(guan)(guan)、熱(re)工(gong)設備(bei)用(yong)(yong)鋼(gang)管(guan)(guan)、機械工(gong)業用(yong)(yong)鋼(gang)管(guan)(guan)、石油、地(di)質(zhi)鉆探用(yong)(yong)鋼(gang)管(guan)(guan)、容(rong)器鋼(gang)管(guan)(guan)、化學(xue)工(gong)業用(yong)(yong)鋼(gang)管(guan)(guan)、特殊用(yong)(yong)途鋼(gang)管(guan)(guan)、其他4.化學(xue)成(cheng)分檢驗 

如：1.低(di)(di)(di)壓(ya)流(liu)體輸送(song)用(yong)焊接鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)（GB/T3092-1993）也(ye)稱(cheng)一(yi)般焊管(guan)(guan)(guan)(guan)(guan)，俗稱(cheng)黑管(guan)(guan)(guan)(guan)(guan)。是用(yong)于輸送(song)水、煤氣、空氣、油和(he)取暖(nuan)蒸汽(qi)等一(yi)般較低(di)(di)(di)壓(ya)力流(liu)體和(he)其(qi)他(ta)用(yong)途的(de)焊接鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)。鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)接壁厚分(fen)為普通鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)和(he)加厚鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)；接管(guan)(guan)(guan)(guan)(guan)端形(xing)式(shi)分(fen)為不帶(dai)螺紋鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)（光(guang)管(guan)(guan)(guan)(guan)(guan)）和(he)帶(dai)螺紋鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)。鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)的(de)規(gui)格(ge)用(yong)公稱(cheng)口徑(jing)(jing)（mm）表示(shi)，公稱(cheng)口徑(jing)(jing)是內徑(jing)(jing)的(de)近似值。習慣上(shang)常(chang)用(yong)英寸(cun)表示(shi)，如11/2 等。低(di)(di)(di)壓(ya)流(liu)體輸送(song)用(yong)焊接鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)除直接用(yong)于輸送(song)流(liu)體外，還大(da)量用(yong)作低(di)(di)(di)壓(ya)流(liu)體輸送(song)用(yong)鍍鋅焊接鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)的(de)原管(guan)(guan)(guan)(guan)(guan)。

2.低壓流體(ti)輸送用(yong)(yong)鍍(du)鋅(xin)焊接(jie)(jie)鋼(gang)管(guan)(guan)(guan)(guan)（GB/T3091-1993）也(ye)稱(cheng)鍍(du)鋅(xin)電(dian)焊鋼(gang)管(guan)(guan)(guan)(guan)，俗(su)稱(cheng)白管(guan)(guan)(guan)(guan)。是(shi)用(yong)(yong)于輸送水、煤氣、空氣、油及(ji)取暖(nuan)蒸汽、暖(nuan)水等一般較低壓力流體(ti)或(huo)其他用(yong)(yong)途的熱浸鍍(du)鋅(xin)焊接(jie)(jie)（爐焊或(huo)電(dian)焊）鋼(gang)管(guan)(guan)(guan)(guan)。鋼(gang)管(guan)(guan)(guan)(guan)接(jie)(jie)壁(bi)厚分(fen)為普(pu)通鍍(du)鋅(xin)鋼(gang)管(guan)(guan)(guan)(guan)和加(jia)厚鍍(du)鋅(xin)鋼(gang)管(guan)(guan)(guan)(guan)；接(jie)(jie)管(guan)(guan)(guan)(guan)端形(xing)式分(fen)為不帶(dai)(dai)螺紋(wen)鍍(du)鋅(xin)鋼(gang)管(guan)(guan)(guan)(guan)和帶(dai)(dai)螺紋(wen)鍍(du)鋅(xin)鋼(gang)管(guan)(guan)(guan)(guan)。鋼(gang)管(guan)(guan)(guan)(guan)的規(gui)格用(yong)(yong)公稱(cheng)口(kou)徑（mm）表(biao)示，公稱(cheng)口(kou)徑是(shi)內徑的近似值。習慣上常用(yong)(yong)英寸表(biao)示，如11/2 等。

3.普通(tong)碳素(su)鋼電(dian)線(xian)套管(guan)（GB3640-88）是工業與(yu)民用(yong)建(jian)筑、安裝機器設備等(deng)電(dian)氣安裝工程中用(yong)于保護電(dian)線(xian)的鋼管(guan)。

4.直縫電焊(han)鋼(gang)管(guan)(guan)（YB242-63）是焊(han)縫與鋼(gang)管(guan)(guan)縱向平行(xing)的鋼(gang)管(guan)(guan)。通(tong)常分為公(gong)制(zhi)電焊(han)鋼(gang)管(guan)(guan)、電焊(han)薄壁管(guan)(guan)、變壓器冷卻油管(guan)(guan)等(deng)等(deng)。

5.承壓流(liu)體輸(shu)(shu)送用(yong)(yong)螺(luo)旋(xuan)縫埋弧焊(han)(han)鋼管（SY5036-83）是(shi)以熱軋鋼帶卷作管坯，經常(chang)溫螺(luo)旋(xuan)成型(xing)，用(yong)(yong)雙面埋弧焊(han)(han)法(fa)焊(han)(han)接，用(yong)(yong)于承壓流(liu)體輸(shu)(shu)送的螺(luo)旋(xuan)縫鋼管。鋼管承壓能力強(qiang)，焊(han)(han)接性能好，經過(guo)各(ge)種(zhong)嚴格的科學檢驗和測試，使用(yong)(yong)安全可(ke)靠。鋼管口(kou)徑大，輸(shu)(shu)送效率高(gao)，并可(ke)節約鋪設管線(xian)的投(tou)資。主(zhu)要用(yong)(yong)于輸(shu)(shu)送石油、天(tian)然氣的管線(xian)。