焊接鋼管也稱焊管，是用鋼板或帶鋼（gāng）經過卷曲成（chéng）型（xíng）後（hòu）焊接製成的鋼管。焊接鋼管生產工藝簡（jiǎn）單，生產效率高，品種（zhǒng）規格多，設備資少，但一般強度低（dī）於無縫鋼管。焊接（jiē）鋼管按焊縫的形式分為直縫焊管和螺（luó）旋焊管。
Welded steel pipe, also known as welded pipe, is a steel pipe made of steel plate or strip after coiling and forming. Welded steel pipe has the advantages of simple production process, high production efficiency, many varieties and specifications and less equipment, but its general strength is lower than that of seamless steel pipe. Welded steel pipe is divided into straight welded pipe and spiral welded pipe according to the form of weld.
焊接（jiē）鋼管采（cǎi）用（yòng）的坯料是鋼板或帶鋼，因其焊接工藝不同而分為爐焊管（guǎn）、電焊（電阻（zǔ）焊）管和自動電弧（hú）焊管。因其焊接形式的不同分為直縫焊管和螺旋焊管兩種。因其端部形狀又分為圓（yuán）形焊管和異型（方、扁（biǎn）等）焊管。焊管因其材質（zhì）和用途不同而分為如下若幹（gàn）品種：
The billet used in welded steel pipe is steel plate or strip. It is divided into furnace welded pipe, electric welded pipe and automatic arc welded pipe because of different welding technology. Because of its different welding forms, it can be divided into straight welded pipe and spiral welded pipe. Because of its end shape, it can be divided into circular welded pipe and special-shaped (square, flat, etc.) welded pipe. Welded pipes can be divided into the following categories because of their different materials and uses:
GB/T3091-2001（低壓流體輸送用鍍鋅焊接鋼管（guǎn））。主要用於輸送水（shuǐ）、煤氣、空氣、油和取暖熱水或蒸汽等一般較低壓力流體和其它用途管。其代表材質為：Q235A級鋼。
GB/T3091-2001 (Galvanized Welded Steel Pipe for Low Pressure Fluid Conveyance). Mainly used for conveying water, gas, air, oil, heating hot water or steam and other general low pressure fluids and other purpose pipes. Its representative material is Q235A grade steel.
GB/T14291-2006（礦用流體輸送焊接鋼管）。主要用於礦山（shān）壓風、排水、軸放瓦斯用直縫焊接鋼管。其代表材質Q235A、B級鋼。GB/T14980-1994（低壓（yā）流體（tǐ）輸送用大直徑電焊鋼管）。主（zhǔ）要用於輸送水、汙水、煤氣、空氣、采暖蒸汽等低壓流體和其它用途（tú）。其代表材（cái）質Q235A級鋼。
GB/T 14291-2006 (Welded Pipe for Mine Fluid Transport). Mainly used for mine air pressure, drainage, shaft gas drainage with straight seam welded steel pipe. Its representative material is grade Q235A and B steel. GB/T 14980-1994 (Large Diameter Welded Steel Pipe for Low Pressure Fluid Conveyance). It is mainly used for conveying low pressure fluids such as water, sewage, gas, air, heating steam and other purposes. Its representative material is grade Q235A steel.
GB/T12770-2002（機械結構用不鏽鋼焊接鋼管（guǎn））。主要用於機械、汽車、自行車、家具、賓（bīn）館和飯店裝飾及其他機械部件與（yǔ）結構件。其代表材質0Cr13、1Cr17、00Cr19Ni11、1Cr18Ni9、0Cr18Ni11Nb等。
GB/T12770-2002 (stainless steel welded steel pipe for mechanical structure). Mainly used for machinery, automobiless, bicycles, furniture, Hotel and hotel decoration and other mechanical parts and structural parts. Its representative materials are 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, etc.
GB/T12771-1991（流體輸送用（yòng）不鏽鋼焊接（jiē）鋼（gāng）管（guǎn））。主要用於輸送低壓腐蝕（shí）性介質。代表材質為0Cr13、0Cr19Ni9、00Cr19Ni11、00Cr17、0Cr18Ni11Nb、0017Cr17Ni14Mo2等。
GB/T12771-1991 (stainless steel welded steel pipe for fluid transportation). Mainly used for conveying low-pressure corrosive media. The representative materials are 0Cr13, 0Cr19Ni9, 00Cr19Ni11, 00Cr17, 0Cr18Ni11Nb, 0017Cr17Ni14Mo2, etc.
另有，裝飾用焊接不鏽鋼管（GB/T 18705-2002），建築裝飾用不鏽鋼焊接管材（JG/T 3030-1995），低（dī）壓流（liú）體輸送用大直徑電焊鋼管（GB/T 3091-2001），以及換熱器用焊接鋼管（YB4103-2000）。
In addition, stainless steel pipes for decoration (GB/T 18705-2002), stainless steel pipes for architectural decoration (JG/T 3030-1995), large diameter welded steel pipes for low pressure fluid transmission (GB/T 3091-2001), and welded steel pipes for heat exchangers (YB4103-2000).
直縫（féng）焊管生產工藝簡單，生（shēng）產效率高，成本低，發展較快。螺旋焊（hàn）管的強度（dù）一般比直縫焊管高，能用較窄的坯料（liào）生產管徑較大的焊管，還可以（yǐ）用同樣寬度的坯料生產管徑不同的焊管。但是與相同長度的直縫管（guǎn）相比，焊縫長度增加30~100%，而且生產速度較低。
Longitudinal welded pipe has the advantages of simple production process, high production efficiency, low cost and rapid development. The strength of spiral welded pipe is generally higher than that of straight welded pipe. It can produce welded pipe with bigger diameter with narrower blank, and welded pipe with different diameter can also be produced with blank of the same width. However, compared with the straight seam pipe of the same length, the length of the weld increases by 30-100%, and the production speed is lower.
因此，較小口徑的焊管大（dà）都（dōu）采用直縫焊，大口徑焊管則大多采用螺旋焊。
Therefore, most of the smaller diameter welded pipes are welded by straight seam welding, while the larger diameter welded pipes are mostly welded by spiral welding.
補充：焊管是用帶鋼（gāng）焊接的，所以在（zài）原來它的地位沒無縫管（guǎn）高。
Supplementary: Welded pipe is welded with strip steel, so it is not as high as seamless pipe in its original position.
焊管種類補充：
Welded pipe type supplement:
1.普通碳素鋼電線套管（guǎn）（GB3640-88）是工業與民用建築、安裝機器設備等電（diàn）氣安裝工程中用於保護電線的鋼管（guǎn）。
1. Common Carbon Steel Wire Bushing (GB3640-88) is a steel pipe used to protect electric wires in industrial and civil buildings, installation machinery and equipment and other electrical installation projects.
2.直縫電焊（hàn）鋼（gāng）管（YB242-63）是焊縫與鋼管縱向平行的鋼管。通常（cháng）分為公製電（diàn）焊鋼管、電焊薄壁管、變壓器冷卻油管等等。
2. Longitudinal welded steel pipe (YB242-63) is a steel pipe with longitudinal parallel weld and steel pipe. Usually it is divided into metric welded steel pipe, welded thin-walled pipe, transformer cooling oil pipe and so on.
3.承壓流體輸送用螺旋縫埋弧焊鋼管（SY5036-83）是以熱軋鋼（gāng）帶卷作管坯，經常溫螺旋成型，用雙麵埋弧焊法焊接，用於承壓流體（tǐ）輸送的螺旋縫鋼管。鋼管承壓能力強，焊接性能好，經過各種嚴（yán）格的科學檢驗和測試，使用安全可靠。鋼管口（kǒu）徑大，輸送效率高，並可節約鋪（pù）設管線的投資。主要（yào）用於輸送石油（yóu）、天然（rán）氣的管線。
3. Spiral submerged arc welded pipe (SY5036-83) for pressure fluid transportation is a kind of spiral welded pipe, which is made of hot rolled steel strip and spirally formed at normal temperature. It is welded by double-sided submerged arc welding and used for pressure fluid transportation. Steel pipe has strong pressure bearing capacity and good welding performance. It is safe and reliable to use after various strict scientific tests and tests. The steel pipe has large diameter, high conveying efficiency and saves investment in laying pipelines. It is mainly used for pipelines to transport oil and natural gas.
4.承壓流體（tǐ）輸送用螺旋縫高（gāo）頻焊鋼管（SY5038-83）是以（yǐ）熱軋鋼帶卷作管坯，經常溫螺旋成型，采用高頻搭接焊法焊接的，用於承壓流（liú）體輸送（sòng）的螺旋縫高頻焊鋼管。鋼管承壓能力強（qiáng），塑性好，便於焊接和加工成型；經過各種嚴格和科學檢（jiǎn）驗和測試（shì），使（shǐ）用（yòng）安全可（kě）靠，鋼管口徑（jìng）大，輸送效（xiào）率高，並可節省鋪（pù）設管線的投資。主要用（yòng）於鋪設輸送（sòng）石油、天然氣等的管（guǎn）線（xiàn）。
4. The SY5038-83 spiral seam high frequency welded steel pipe for pressure fluid transportation is a high frequency spiral seam high frequency welded steel pipe for pressure fluid transportation, which is formed by hot rolled steel strip coil and is welded by high frequency lap welding at regular temperature. The steel pipe has strong bearing capacity, good plasticity, and is easy to be welded and processed. Through various strict and scientific tests and tests, it is safe and reliable to use, large diameter of steel pipe, high transportation efficiency, and can save the investment of laying pipelines. It is mainly used for laying pipelines for oil and natural gas transportation.
5.一般（bān）低壓（yā）流體輸送用螺旋縫埋弧焊鋼管（SY5037-83）是以熱軋鋼帶（dài）卷作管坯，經常溫螺旋成（chéng）型（xíng），采用雙麵（miàn）自動埋弧焊或單麵焊法製成的用於水（shuǐ）、煤氣、空氣和蒸汽等一般低壓流體輸送用埋弧焊鋼管。
5. Spiral submerged arc welded steel pipes (SY5037-83) for low-pressure fluid transportation are usually made of hot-rolled steel strip coils and spirally formed at normal temperature. They are used for water, gas, air, steam and other general low-pressure fluid transportation by double-sided automatic submerged arc welding or single-sided welding.
6.一般低壓流體輸送用螺旋縫高頻焊鋼管（guǎn）（SY5039-83）是（shì）以熱軋鋼（gāng）帶（dài）卷（juàn）作管坯，經（jīng）常溫螺旋成型，采用高頻搭接焊（hàn）法焊接用於一般低壓流體輸送用螺旋縫高頻焊鋼管。
6. Spiral seam high frequency welded steel pipes (SY5039-83) for low-pressure fluid transportation are usually formed by hot-rolled steel strip coils and spirally formed at normal temperature. High frequency lap welding method is used to weld spiral seam high frequency welded steel pipes for general low-pressure fluid transportation.
7．樁用（yòng）螺旋焊（hàn）縫鋼管（SY5040-83）是（shì）以熱軋鋼（gāng）帶卷作管坯，經常溫（wēn）螺（luó）旋成型，采用雙麵埋弧焊接或高（gāo）頻焊接製成（chéng）的，用（yòng）於（yú）土木建築（zhù）結構、碼頭、橋梁等基礎樁
7. Spiral welded steel pipe for piles (SY5040-83) is made of hot-rolled steel strip coil as billet, spirally formed at normal temperature, double-sided submerged arc welding or high frequency welding. It is used in civil building structures, wharfs, bridges and other foundation piles.
按用（yòng）途分類（lèi）
Classification by use
又分為一般焊管、鍍鋅焊管（guǎn）、吹（chuī）氧焊（hàn）管、電線套管、公製（zhì）焊管、托輥管、深井（jǐng）泵管、汽車用管、變壓器管、電焊薄壁管、電焊異型管和螺（luó）旋焊管。
It is also divided into general welded pipe, galvanized welded pipe, oxygen blowing welded pipe, wire sleeve, metric welded pipe, idler pipe, deep well pump pipe, automobiles pipe, transformer pipe, welded thin-walled pipe, welded special-shaped pipe and spiral welded pipe.
一般焊管：一般焊管用來輸送低壓流體。用Q195A、Q215A、Q235A鋼製造。也可采用（yòng）易於焊（hàn）接的其它軟（ruǎn）鋼製造。鋼管要進行水壓（yā）、彎曲、壓扁等實驗，對表麵質量（liàng）有一定要求，通常交貨長度為4-10m，常要求定尺（或倍尺）交貨。焊管的規格用公稱口徑（jìng）表示（shì）（毫米或英寸）公稱口徑與實（shí）際不同（tóng），焊管按規
General welded pipe: General welded pipe is used to transport low-pressure fluid. Made of Q195A, Q215A and Q235A steel. It can also be made of other soft steels which are easy to weld. In order to carry out hydraulic, bending and flattening experiments on steel pipes, there are certain requirements for surface quality. Usually the delivery length is 4-10m, and the delivery of steel pipes is usually required to be of fixed size (or double size). The specification of welded pipe is expressed by nominal caliber (millimeter or inch). The nominal caliber is different from the actual one. The welded pipe is in accordance with the regulations.
