ALLLAND Boiler Steel Pipe Supply
Welcome to ALLLAND Steel Pipe Manufacturing. We specialize in the production, R&D, and supply of seamless and welded steel pipes. Our boiler steel pipe are manufactured from premium steel billets through hot rolling, cold drawing/cold rolling, and standardized heat treatment processes. Available in a comprehensive range of dimensions, our products meet diverse application requirements. All products undergo rigorous testing before shipment, including chemical composition analysis, mechanical property testing, hydrostatic pressure testing, non-destructive testing (UT/ET), and dimensional/visual inspection. This ensures every pipe meets the safety requirements for boiler system applications.
Alllandsteel is a steel pipe manufacturer based in China with 25 years of experience. The facility spans 22,000 square meters, represents a RMB 700 million investment, and operates four production lines (JCOE, ERW, SMLS, SSAW) alongside five coating lines. With an annual production capacity of 250,000 tons, the factory covers specifications ranging from Ø406 to Ø1524 and holds multiple international certifications (API/ASTM/EN/ISO/JIS). Focused on steel pipes, creating value for you!
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Natural Gas Pipe refers to specialized pipelines designed for transporting natural gas from extraction sites to distribution points and ultimately to household end-users. Typically constructed from carbon steel, Natural Gas Pipe does not refer to the flexible hoses commonly seen in residential settings. These pipes are deployed in urban gas network systems and industrial gas systems, generally featuring high strength, excellent sealing performance, and corrosion resistance. Production standards for Natural Gas Pipe are diverse, with compliance to API, ASTM, EN, and GB specifications. Manufacturing processes commonly employ ERW or LSAW welding techniques.
O.D.:
1/2”-48” (21.34mm-121mm)(Common dimensions)
W.T.:
2.0mm-25.4mm
Length:
6 m / 12 m / Random Length
Process:
ERW / Seamless / LSAW
Standards:
API 5L, ASTM A53, ASTM A106, EN 10208, GB/T 9711
Steel Grades:
API 5L Gr.B, X42, X52, X60 / ASTM Gr.A, Gr.B
Surface Treatment:
Black, Varnish, 3LPE, FBE, Galvanized (for low pressure)
Tube Ends :
Plain End (BE), Beveled End (BW), Threaded End
Natural Gas Pipe Manufactured by ALLLAND
Natural gas pipes range in size from 1/2“ to 48”, with different sizes suited for distinct applications. Larger pipes aren’t necessarily better; factors like pressure rating, cost, flow rate, and distance must be considered. Below, we analyze the relationship between pipe size and application scenarios from an engineering perspective.
OD: 1/2“ – 4” (21.34 – 114.30 mm)
Scenario: Low-pressure pipelines, suitable for residential buildings and commercial districts.
Requirements: Precise sizing
OD: 6“ – 12” (168.28 – 323.85 mm)
Application: Urban gas distribution pipelines
Requirements: Excellent sealing integrity, corrosion-resistant coating, suitable for underground environments.
OD: 14“ – 24” (355.60 – 609.60 mm)
Application: Urban trunk pipeline networks with moderate pressure
Requirements: Superior corrosion-resistant weldability, stable performance, and pressure tolerance.
OD: 30“ – 48” (762.00 – 1219.00 mm)
Application: Long-distance transmission pipelines.
Requirements: Capable of withstanding high pressure and large flow rates, with extended service life.
| Item | ERW Pipe | Seamless Pipe | LSAW Pipe |
| Manufacturing Process | High-frequency electric resistance welding | Hot rolled or cold drawn without weld seam | Longitudinal submerged arc welding |
| Weld Seam | Longitudinal weld | No weld seam | Longitudinal SAW weld |
| Typical Diameter Range | 1/2″ – 24″ | 1/2″ – 20″ | 16″ – 48″ |
| Typical Wall Thickness | Thin to medium | Medium to thick | Medium to very thick |
| Pressure Rating | Low to medium pressure | Medium to high pressure | Medium to high pressure |
| Strength Uniformity | Good, consistent | Excellent, uniform structure | Very good, controlled weld quality |
| Dimensional Accuracy | High | Good | Good |
| Cost Level | Economical | Higher | Medium to high |
| Typical Applications | City gas distribution, low-pressure pipelines | High-pressure gas lines, critical sections | Large-diameter transmission pipelines |
| Advantages | Easy installation, precise dimensions | High pressure resistance | Large diameter, extended service life |
| Recommended Use | Urban gas systems | Pipeline systems with stringent pressure requirements | Long-distance, high-flow transportation projects |
Yes, ERW pipes are safe and have been widely used in natural gas systems for medium and low-pressure applications, particularly in urban gas pipeline networks. They are highly secure when inspected regularly.
Seamless pipes are typically used for high-pressure natural gas pipelines. The absence of welds eliminates stress concentration-induced fractures, making them better suited for high-pressure environments. Additionally, seamless pipes feature thicker walls and robust corrosion protection systems, making them the preferred choice for high-pressure applications.
Wall thickness for natural gas pipes is not a fixed value but depends on multiple factors, including design pressure, pipe diameter, steel grade, corrosion rate, and temperature. Commonly used standards in engineering, such as API 5L and ASME B31.8, require wall thickness to be calculated according to these specifications.