建筑施工過程中，我們會看到很多不同的建筑鋼材，它們所起到的作用也是不一樣的，其中包含了方管。很多朋友只知道方管是建筑鋼材，但對于它的工藝分類了解的并不是太多，接下來就讓我們跟隨濟(jì)南方管的小編來為您講一講：

During the construction process, we will see many different building steels, which play different roles, including square tubes. Many friends only know that square tube is construction steel, but they don't know much about its process classification. Next, let's follow the Xiaobian of Jinan square tube to tell you:

方管工藝分類介紹

Introduction to process classification of square tube

方管按生產(chǎn)工藝分：熱軋無縫方管、冷拔無縫方管、擠壓無縫方管、焊接方管。

Square tubes are divided into hot-rolled seamless square tubes, cold drawn seamless square tubes, extruded seamless square tubes and welded square tubes according to the production process.

其中焊接方管又分為：

The welded square pipe is divided into:

1、按工藝分——電弧焊方管、電阻焊方管(高頻、低頻)、氣焊方管、爐焊方

1. According to the process - arc welding square tube, resistance welding square tube (high frequency and low frequency), gas welding square tube and furnace welding square tube

2、按焊縫分——直縫焊方管、螺旋焊方管。

2. According to the weld - straight welded square pipe and spiral welded square pipe.

材質(zhì)分類：

Material classification:

方管按材質(zhì)分：普碳鋼方管、低合金方管。

Square tubes are divided into ordinary carbon steel square tubes and low alloy square tubes according to material.

1、普碳鋼分為：Q195、Q215、Q235、SS400、20#鋼、45#鋼等。

1. Ordinary carbon steel is divided into Q195, Q215, Q235, SS400, 20# steel, 45# steel, etc.

2、低合金鋼分為：Q345、16Mn、Q390、ST52-3等。

2. Low alloy steels are divided into Q345, 16Mn, Q390, St52-3, etc.

生產(chǎn)標(biāo)準(zhǔn)分類：

Production standard classification:

方管按生產(chǎn)標(biāo)準(zhǔn)分：國標(biāo)方管，日標(biāo)方管，英制方管，美標(biāo)方管，歐標(biāo)方管，非標(biāo)方管。

Square tubes are divided into national standard square tubes, Japanese standard square tubes, British standard square tubes, American standard square tubes, European standard square tubes and non-standard square tubes according to production standards.

斷面形狀分類：

Section shape classification:

方管按斷面形狀分類：

Square pipes are classified according to section shape:

1、簡單斷面方管：方形方管、矩形方管。

1. Simple section square tube: square tube, rectangular square tube.

2、復(fù)雜斷面方管：花形方管、開口形方管、波紋形方管、異型方管。

2. Square tube with complex section: flower shaped square tube, open square tube, corrugated square tube and special-shaped square tube.

表面處理分類：

Surface treatment classification:

方管按表面處理分：熱鍍鋅方管、電鍍鋅方管、涂油方管、酸洗方管。

Square pipes are divided into hot-dip galvanized square pipes, electro galvanized square pipes, oiled square pipes and pickled square pipes according to surface treatment.

用途分類：

Use classification:

方管按用途分類：裝飾用方管、機(jī)床設(shè)備用方管、機(jī)械工業(yè)用方管、化工用方管、鋼結(jié)構(gòu)用方管、造船用方管、汽車用方管、鋼梁柱用方管、特殊用途方管。

Square tubes are classified by purpose: square tubes for decoration, square tubes for machine tool equipment, square tubes for mechanical industry, square tubes for chemical industry, square tubes for steel structure, square tubes for shipbuilding, square tubes for automobile, square tubes for steel beams and columns, and square tubes for special purposes.

壁厚分類：

Wall thickness classification:

方管按壁厚分類：超厚壁方管、厚壁方管和薄壁方管。

Square tubes are classified according to wall thickness: ultra thick wall square tubes, thick wall square tubes and thin wall square tubes.