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Galvanized Pipe

Your Professional galvanized pipe Supplier

 

Tianjin Shenzhoutong Steel Pipe Co.,Ltd is a manufacturer and exporter dedicated to steel pipe industry. There are three main kinds of products in our factory--ERW Steel Pipes, Spiral Steel Pipes and Oil Casing Pipes. The products are widely used in petroleum, natural gas, gas, coal, machinery, electric power, piling and other purposes.


Accept ODM/OEM Services
All steel pipes produced by our company can be customized to meet the specific requirements of various industries and applications. The customization process begins with a thorough consultation between our technical experts and the client to ensure that all specific needs are addressed.

 

Production Equipment
Our company utilizes state-of-the-art international technological equipment, including W-FF molding, solid-state high-frequency induction welding, ultrasonic testing, and magnetic flux leakage detection. We also employ high-end testing equipment such as metallographic analysis instruments, Vickers hardness testers, impact testing machines, spectrum analyzers, and universal testing machines.

 

Honor Certificates
Since its establishment, our company has achieved numerous international certifications and honors, including API 5L, API 5CT, ISO 9001-2008, CE Certificate, pressure pipe production license, industrial products production license, Chinese petroleum and petrochemical membership card, China Quality Product Certification, Tianjin Famous Brand, exemption product, and recognition as one of the top 100 private enterprises in Tianjin.

 

Sales Market
Our products are exported to regions such as the Middle East, South America, North America, the European Union, and Southeast Asia. Over the years, we have earned an excellent reputation among customers worldwide.

First 1234567 Last
Dimensions of Galvanized Pipe Sizes Chart(OD Chart)

 

DN

O.D.

W.T.

Inch

mm

SCH5S

SCH10S

SCH10

SCH20

SCH30

SCH40

SCH60

SCH80

SCH100

SCH120

SCH140

SCH160

Sth

XS

XXS

50

2″

60.3

1.65

2.77

–

–

–

3.91

–

5.54

–

–

–

8.74

3.91

5.54

11.07

65

2 1/2″

73

2.11

3.05

–

–

–

5.16

–

7.01

–

–

–

9.53

5.16

7.01

14.02

80

3″

88.9

2.11

3.05

–

–

–

5.49

–

7.62

–

–

–

11.13

5.49

7.52

15.24

90

3 1/2″

101.6

2.11

3.05

–

–

–

5.74

–

8.08

–

–

–

–

5.74

8.08

–

100

4″

114.3

2.11

3.05

–

–

–

6.02

–

8.58

–

11.13

–

13.49

6.02

8.56

17.12

125

5″

141.3

2.77

3.4

–

–

–

6.55

–

9.53

–

12.7

–

15.88

6.55

9.53

18.05

150

6″

168.3

2.77

3.4

–

–

–

7.11

–

10.97

–

14.27

–

18.26

7.11

10.97

21.95

200

8″

219.1

2.77

3.76

–

6.35

7.04

8.18

10.31

12.7

15.09

18.26

20.62

23.01

8.18

12.7

22.23

250

10″

273.1

3.4

4.19

–

6.35

7.8

9.27

12.7

15.09

18.26

21.44

25.4

28.58

9.27

12.7

25.4

300

12″

323.9

3.96

4.57

–

6.35

8.38

10.31

14.27

17.48

21.44

25.4

28.58

33.32

9.53

12.7

25.4

350

14″

355.5

3.96

4.78

6.35

7.92

9.53

11.13

15.09

19.05

23.83

27.79

31.75

35.71

9.53

12.7

–

400

16″

406.4

4.19

4.78

6.35

7.92

9.53

12.7

16.66

21.44

26.19

30.96

36.53

40.49

9.53

12.7

–

450

18″

457.2

4.19

4.78

6.35

7.92

11.13

14.27

19.05

23.83

39.36

34.93

39.67

45.24

–

–

–

500

20″

508

4.78

5.54

6.35

9.53

12.7

15.09

20.62

26.19

32.54

38.1

44.45

50.01

–

–

–

550

22″

558.8

4.78

5.54

6.35

9.53

12.7

–

22.23

28.58

34.93

41.28

47.63

53.98

–

–

–

600

24″

609.6

5.54

6.35

6.35

9.53

14.27

17.48

24.61

30.96

38.89

46.02

52.37

59.54

–

–

–

 

Types of Galvanized Pipe

 

 

Hot-dipped Galvanized Pipes
These are produced by immersing the steel pipe in molten zinc. They offer a thick, robust coating and are commonly used in industrial and heavy-duty applications.

 

Electro-galvanized Pipes
A thin layer of zinc is bonded to the steel through electrical means. They are slightly less durable than the hot-dipped version but are more aesthetically pleasing and find their place in decorative and lighter applications.

 

Inspection Methods for Galvanized Steel Pipes

Magnetic test

Using a magnet, you can test whether a pipe is galvanized by checking if it attracts to the pipe's surface. If the magnet does not attract, it indicates the presence of a zinc coating.

01

Non-destructive thickness measurement

This method, conducted by professionals, uses ultrasonic equipment to measure the thickness of the zinc coating on the pipe, confirming galvanization.

02

Chemical analysis

A chemical analysis of the pipe's coating can identify the presence of zinc, providing confirmation of galvanization.

03

Electrical conductivity test

This test measures the electrical conductivity of the pipe, which can indicate the presence of zinc coating.

04

Visual inspection

A thorough visual inspection of the pipe's surface, looking for the spangled texture and other physical characteristics of galvanized pipes, can also help confirm galvanization.

05

 

Difference Between Hot-Dip Galvanizing and Pre-Galvanizing Pipe

 

Feature

Hot Dip Galvanization

Pre-Galvanizing

Coating Thickness

Thick coating with minimum average requirements of 45-85μm within BS EN ISO 1461

The coating thickness may vary, but it is typically circa 20μm for sheets and 20-30μm for tubes

Coating Continually

Continuous coating over the whole object

The uncoated area at cut edges

Coating Bond

Strong metallurgical bond with the base steel

Strong metallurgical bond with the base steel

Coating Formability

Forming after hot dipped galvanizing is not advised as it may damage the coating

A thin coating may be normally formed without any damage

Coating Appearance

Normally bright, but can be variable

Normally bright

Abrasion Resistance

A thicker layer of hard zinc-iron alloy gives a high resistance to abrasion

Thin alloy layer with reduced resistance to abrasion

Sacrificial Protection

Offer the highest level of sacrificial protection

Reduced sacrificial protection due to thin layer coating and at some uncoated areas (cut edges)

 

Applications of Galvanized Pipe

Automotive and Aerospace

Through the process of galvanization, a lightweight yet durable material can be created to properly fit aeronautic standards. These galvanized iron pipes can also be used to create a leak-resistant pipe for airline fittings and air pipes. Compressed air can be tricky to handle but with the right piping system, it can be easy to achieve a high-quality, lasting result through the use of properly galvanized materials.

Plumbing

Similar to the aerospace industry, plumbing and piping can use galvanized iron pipes. The life expectancy of galvanized plumbing systems can last up to 70 years depending on the region’s conditions. The conditions include water impurities, zinc thickness, and proximity to electrical grids. It can be used for both residential and commercial projects, as well as outdoor applications that need galvanized iron’s mechanical strength in harsh weather conditions.

Wind and Solar

Solar projects have a continuous workflow. Any interruptions can cause revenue loss. It is important to use a material that can withstand corrosion and more. This is why galvanized iron pipes and steel pipes are popular for solar power sites. The corrosion resistance ensures that structures can last for years, even when exposed to harsh elements.

Agriculture

Agriculture equipment is easily susceptible to corrosion. Chemical and natural forces can tear down tools and equipment if they lack a protective layer. Instead of opting for these, resilient tools and equipment can be achieved through galvanization and galvanized iron pipes. Agricultural equipment becomes tougher and more resilient. It can withstand wear from constant use and harsh chemicals.

Construction

Arguably the most common industry that makes use of galvanized iron pipes is the construction industry. That’s for good reason as it has been popular for over a century and has been the top choice of many experts. The durability of galvanized iron pipes can be used for residential and commercial applications.

Telecommunications

Phone lines are the backbone of society’s communication. It can be very hard to maintain and keep these important structures in shape if the wrong material is used. The wrong material can put maintenance workers at risk and it can also damage the structure itself. Instead of worrying about this problem, more telecommunication companies are making use of galvanized iron pipes and materials to provide a low-maintenance structure.

 

 

Shipment

 

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Our Factory

 

Tianjin Shenzhoutong Steel Pipe Co.,Ltd ,with total investment of RMB 260 million, was founded in 2001 and occupied 86,000 square meters and building area 28,000 square meters. It is located in the Chinese Steel Pipes Base - Da qiu zhuang, Tianjin. 46 kilometers away from Tianjin Port and 3 km away from the high-speed exit, So the transportation is very convenient. More than 400 employees and over 70 Senior staff are working in the company.

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Our Certificate

 
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FAQ

 

Q: What are the two grades of galvanised pipe?

A: Many different grades of steel can be galvanized. A53 steel pipe and A595 steel pipe are two of the mostly common grades.

Q: When not to use galvanized pipe?

A: Older galvanized pipes may have lead in the zinc coating, which can leach into the water supply, posing a serious health risk. This is particularly concerning for drinking water.

Q: How to tell if galvanized pipe is bad?

A: If the water coming from your faucet is brown or rust-colored, your pipes may be corroding.
If the water pressure in your home is lower than usual, your pipes may be failing.
If your pipes are leaking, it could be a sign that they are nearing the end of their life.
If you see rust around pipe joints or rust spots on the pipes themselves, your pipes may be corroding.

Q: What not to use with galvanized steel?

A: You should avoid using copper, brass, aluminum cleaners, bleach, strong alkalis like cement, acidic water or soil, and quicklime with galvanized steel, as they can cause rapid corrosion due to galvanic corrosion, where the zinc coating on the galvanized steel is quickly eroded when in contact with these materials, especially in humid environments.

Q: How to test for galvanized pipes?

A: If the scraped area remains a dull gray color, and a magnet sticks to the surface, your service line is most likely galvanized steel.

Q: How do you keep galvanized pipe from rusting?

A: Regular Inspection.
Protective Coatings.
Cathodic Protection.
Electrochemical Inhibitors.
Regular Cleaning.
Regular Maintenance.
Consult Professionals.

As one of the most professional galvanized pipe manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to buy high-grade galvanized pipe from our factory.

Hot dipped Galvanized Welded Pipe, Galvanized Rectangular Pipe, Galvanized Scaffolding