HDG hollow steel pipe type

HDG square pipe, HDG round pipe, HDG rectangular pipe,Galvanized Steel Pipes and Tubes,HDG erw welded pipe, HDG seamless pipe, HDG spiral welded pipe

HDG hollow Steel pipe specification:

Outer diameter: 1/4”-40” (13.7mm-1016mm)

Wall thickness: 1.5mm-80mm

Length: 3m-14m

HDG hollow steel pipe production process

Pickling and hot dip galvanizing
Zinc layer thickness: 20μm; 30μm；50μm；60μm or as require

HDG hollow steel pipe application

Widely used in industry, construction, highway billboards, fire fighting,airport expansion project,hospital safety project.
Hot-galvanized advantages

• low-cost processing: hot-dip galvanized anti-rust lower cost than the cost of other paint coating;

• Durable: standard hot dip galvanized rust thickness can be kept for 50 years or more in the rural environment, without having to patch; standard hot dip galvanized rust layer can be maintained for 20 years in the urban areas or offshore area, without having to patch;

• good reliability: galvanized layer with steel is metallurgically bonded to become a part of the surface of the steel, and therefore more reliable coating persistent;

• the toughness of the coating: zinc coating to form a special metallurgical structure, this structure can withstand transportation and use of mechanical damage;

• full protective: plated parts each part can be plated with zinc, even in the recesses, sharp corners and hiding places can be fully protected;

• saving time and effort: the the galvanizing process faster than other coating construction method, and can avoid the the brushing time required on site after installation.

HDG Hollow steel pipe quality inspection:

1. Our factory has its own "experimental testing center".CNAS Laboratory Accreditation Certificate

2.Control quality strictly.The first pass is the quality inspection on the production line,The second pass is full inspection of the  production quality .

3.We have got internationally recognized certificates, ISO, CE, LR,Philippine certificate,also support third-party testing,as SGS, BV, ect.

HDG hollow Steel Pipe feature

During galvanizing, steel is immersed in a molten zinc bath, ensuring a tough, uniform barrier coating.

Zinc's natural corrosion resistance provides long-term protection, even in outdoor environments. Apart from preventing water corrosion, it is equally effective in dry, indoor environments.

Galvanized Steel Pipes and Tubes made of galvanized steel has long been one of the most used building materials in the world. For decades, designers, builders and consumers seeking long-term structural performance in the harshest of outdoor applications have turned to zinc-coated steel pipes. Zinc-coated galvanized steel pipes and tube resist the attack of wind, water and road salts.

Galvanizing alloy layer mainly depends on the thickness of the silicon content of the steel chemical composition, the rough degree of the size of the cross-sectional area of the steel surface of the steel, the temperature of the zinc pot, the zinc immersion time, the cooling speed, and the cold deformation.