國標螺(luó)旋鋼(gāng)管(guǎn)主(zhǔ)要依據的(de)標準(zhǔn)爲(wèi)GB/T9711-1997石油(yóu)天然(rán)氣(qì)工(gōng)業輸(shū)送(sòng)鋼管,其中有(yǒu)包(bāo)括(kuò)GB/T9771.1(代(dài)表A級(jí)鋼)和GB/T9711.2(代表B級(jí)鋼(gāng)),GB9711.2包括(kuò)的(de)質量和(hé)試驗要求(qiú)在總(zǒng)體上(shàng)高(gāo)於(yú)GB9711.1的(de)規定(dìng),GB9711.2一般適(shì)用(yòng)於可燃流體(tǐ)輸送用鋼管,不(bù)適(shì)用於(yú)鑄管(guǎn)。部(bù)標(biāo)螺(luó)旋(xuán)鋼(gāng)管標(biāo)準是SY/T5037-2000(普(pǔ)通(tōng)流體輸(shū)送(sòng)管(guǎn)道(dào)用螺旋(xuán)縫(fèng)埋(mái)弧焊鋼管(guǎn)),此(cǐ)標(biāo)準(zhǔn)爲(wèi)部(bù)標(biāo),GB/T9711爲國(guó)標(biāo),國(guó)標對鋼(gāng)管(guǎn)的要(yào)求比部(bù)標(biāo)要(yào)高(gāo)。(5037是普通流(liú)動(dòng)輸(shū)送管道(dào)用(yòng)鋼管(guǎn);9711是(shì)工業(yè)輸(shū)送(sòng)用鋼管(guǎn));
國標(biāo)鋼(gāng)管(guǎn)的(de)性能(néng)如下;SY/T5037-2000 GB/T9711.1-1997(A級(jí)) API Spec 5L(42)
【適(shì)用範圍(wéi)】 燃(rán)氣(qì)、水、煤(méi)氣、空(kōng)氣(qì)、採(cǎi)暖(nuǎn)、蒸(zhēng)氣(qì)等普通流(liú)體(tǐ)輸(shū)送管道用鋼(gāng)管 石油天(tiān)然氣(qì)工業(yè)輸(shū)送(sòng)用(yòng)鋼(gāng)管 石(shí)油天(tiān)然氣工業(yè)輸(shū)送(sòng)用(yòng)鋼(gāng)管
鋼(gāng)種 Q195、Q215、Q235 L175——L483 A、B、X42——X70
尺寸(cùn) 管(guǎn)體外(wài)徑 D<508 ±0.75%D D≥508 ±1.00%D,D<508 ±0.75%D D≥508 ±1.00%D ,D<508 ±0.75%D 508≥D≥914 -0.25%D~+0.75%D,D>914 -3.20~+6.35
管端外徑 D<508 ±0.75%D ±2.5 取小值(zhí) D≥508 ±1.00%D ±4.5 取小(xiǎo)值(zhí),D≤273.1 -0.40~+1.59 D>323.9 -0.79~+2.38,D≤273.1 -0.40~+1.59 D>273.1 -0.79~+2.38
偏差 壁(bì)厚(hòu) D<508 ±12.5%t -12.5%t~+15.0%t -12.5%t~+15.0%t,D≥508 ±10.0%t L175~L245 -10.0%t~+17.5%t 不高(gāo)於(yú)B級 -12.5%t~+17.5%t,L290~L555 -8.0%t~+19.5%t 不低(dī)於(yú)X42 -8.0%t ~+19.5%t
【化(huà)學分(fēn)析(xī)】:每熔鍊批取(qǔ)1個試(shì)樣,每(měi)熔(róng)鍊(liàn)批(pī)取(qǔ)2個(gè)試樣(yàng),每(měi)熔鍊批取2個試(shì)樣;拉伸(shēn)試樣:每(měi)檢(jiǎn)驗(yàn)批取一(yī)個焊(hàn)接接(jiē)頭(tóu)試(shì)樣(yàng);母材(cái)取(qǔ)樣(yàng):每熔(róng)鍊(liàn)批(pī)取(qǔ)1個(gè)試樣;螺(luó)旋焊(hàn)管(guǎn)焊縫(fèng):每(měi)熔(róng)鍊(liàn)批(pī)取(qǔ)1個(gè)試樣對(duì)頭焊縫(fèng);不(bù)多於(yú)50根(gēn)取(qǔ)一個(gè)試樣母(mǔ)材(cái),每(měi)熔鍊批取(qǔ)1個試(shì)樣;螺旋(xuán)焊縫(fèng):每(měi)熔(róng)鍊批(pī)取(qǔ)1個(gè)試(shì)樣對頭焊(hàn)縫:不(bù)多(duō)於50根(gēn)取(qǔ)一個(gè)試(shì)樣(yàng);
【檢(jiǎn)測(cè)檢(jiǎn)驗(yàn)】:導(dǎo)向(xiàng)彎曲(qū)試(shì)驗(yàn):不(bù)做,每(měi)檢(jiǎn)驗批(pī)取(qǔ)一(yī)個(gè)正彎試樣(yàng)和(hé)一(yī)個(gè)反(fǎn)彎試(shì)樣,對(duì)頭焊(hàn)縫(fèng)不(bù)多於(yú)50根取(qǔ)一(yī)個(gè)正(zhèng)彎(wān)試(shì)樣和一(yī)個反彎(wān)試(shì)樣.每(měi)檢(jiǎn)驗(yàn)批取(qǔ)一個(gè)正彎試(shì)樣和(hé)一個(gè)反(fǎn)彎(wān)試樣(yàng),對頭(tóu)焊(hàn)縫(fèng)不(bù)多(duō)於(yú)50根取(qǔ)一個正(zhèng)彎試(shì)樣(yàng)和一(yī)個(gè)反(fǎn)彎試(shì)樣(yàng)。斷(duàn)裂韌(rèn)性試驗(yàn):不(bù)做(zuò),合(hé)同(tóng)要(yào)求(qiú)時(shí),夏(xià)比(bǐ)衝(chōng)擊(jī)每(měi)熔鍊(liàn)批(pī)取(qǔ)3個; D≥508時(shí),落(luò)錘(chuí)衝擊(jī)每(měi)熔(róng)鍊批取(qǔ)2個(gè)合同(tóng)要求時(shí),夏(xià)比(bǐ)衝(chōng)擊(jī)每(měi)熔(róng)鍊(liàn)批(pī)取3個(gè); D≥508時(shí),落(luò)錘(chuí)衝(chōng)擊每(měi)熔(róng)鍊(liàn)批(pī)取2個無(wú)損(sǔn)檢(jiǎn)驗(yàn) 補焊(hàn)焊(hàn)縫(fèng),對頭(tóu)焊縫(fèng),環(huán)向焊(hàn)縫(fèng)應(yīng)進(jìn)行(xíng)X射(shè)線(xiàn)或(huò)超聲波檢(jiǎn)驗(yàn);螺旋焊(hàn)縫(fèng)抽(chōu)查(chá)20%的(de)鋼(gāng)管(guǎn),用(yòng)於(yú)可(kě)燃氣體(tǐ)輸(shū)送管的螺(luó)旋焊縫(fèng)應(yīng)100%的檢驗,100X檢(jiǎn)驗(yàn)或(huò)100%超聲(shēng)波檢(jiǎn)測(cè),加(jiā)對頭焊(hàn)縫、丁(dīng)字焊縫(fèng)和管(guǎn)端(duān)203mm X射(shè)線檢(jiǎn)驗 100X檢(jiǎn)驗或(huò)100%超(chāo)聲(shēng)波(bō)檢(jiǎn)測,加(jiā)對(duì)頭(tóu)焊縫(fèng)、丁(dīng)字(zì)焊(hàn)縫(fèng)和(hé)管(guǎn)端(duān)203mm X射線(xiàn)檢驗(yàn) D:鋼(gāng)管公稱(chēng)外徑(jìng),mm t:鋼管公(gōng)稱壁厚(hòu),mm [σ]靜(jìng)水(shuǐ)壓(yā)試(shì)驗(yàn)的(de)試(shì)驗(yàn)應力(lì),MPa;L:單(dān)根鋼管(guǎn)長度(dù) P:靜(jìng)水(shuǐ)壓(yā)試(shì)驗(yàn)壓力,Pa
【螺(luó)旋(xuán)鋼(gāng)管水壓(yā)標準(zhǔn)】:部標大口徑(jìng)螺(luó)旋鋼(gāng)管(guǎn)與(yǔ)國(guó)標(biāo)螺(luó)旋(xuán)鋼(gāng)管(guǎn)的主要區別(bié)標準(zhǔn)的(de)國(guó)標(biāo)鋼管不允(yǔn)許Q235B材(cái)質(zhì),必(bì)須是(shì)管(guǎn)線(xiàn)鋼(gāng)部標(biāo)螺(luó)旋鋼(gāng)管(guǎn)主(zhǔ)要使(shǐ)用(yòng)符(fú)號(hào)D-----鋼管標(biāo)稱外(wài)徑(jìng)mm T----鋼(gāng)管標(biāo)稱(chēng)壁厚(hòu)mm M----鋼管(guǎn)線(xiàn)質(zhì)量kg/mP----靜水試驗的試(shì)驗壓力Mpa S----靜水(shuǐ)試驗的(de)試(shì)驗應力(lì)Mpa h----焊縫(fèng)餘(yú)高(gāo)mm;