Supplier highlights:This supplier mainly exports to the Democratic Republic of Congo, the UK, and Brazil. They offer full customization, design customization, and sample customization services, and have product certifications.
I. Specifications & Structure: Core Advantages of Large Diameter
As a large-diameter pipe with an outer diameter of 1219mm, its specification characteristics directly determine the uniqueness of its application scenarios:
Ultra-high Transportation Efficiency: The large inner diameter of the 48 Inch pipe (the actual inner diameter is calculated based on the wall thickness; if the wall thickness is 10mm, the inner diameter is approximately 1199mm) enables extremely high fluid flux. The volume of water, chemical media, or gas transported per unit time is far higher than that of small and medium-diameter pipes (e.g., 3-4 times higher than that of 24 Inch pipes). It is suitable for "main pipe" or "header pipe" requirements (such as urban water supply trunks, raw material transportation main pipes in large chemical plants).
Wall Thickness & Pressure Adaptability: To balance the structural stability and pressure-bearing capacity of large-diameter pipes, the wall thickness of 48 Inch 300 Series steel pipes usually ranges from 6mm to 25mm (specifically, it must comply with standards such as ASTM A312, EN 10216-5, or GB/T 14976). Thicker walls (e.g., 15mm-25mm) are applicable to medium-pressure working conditions (such as 1.6MPa-4.0MPa chemical medium transportation), while thinner walls (e.g., 6mm-12mm) are suitable for low-pressure large-flow scenarios (such as municipal rainwater drainage, industrial circulating water main pipes).
Structural Stability for Large-scale Systems: In large-scale engineering systems (e.g., large-scale thermal power plant cooling water pipelines, offshore platform seawater intake pipes), the use of 48 Inch large-diameter pipes can reduce the number of pipe connections (compared to using multiple small-diameter pipes in parallel). This not only simplifies the pipeline layout but also reduces potential leakage points, improving the overall safety and maintenance efficiency of the system.
II. Material Performance: Inheriting High Performance of 300 Series Stainless Steel
The 300 Series stainless steel (represented by 304, 304L, 316, 316L, 321, etc.) is the core material of this pipe, providing it with excellent comprehensive performance:
Superior Corrosion Resistance: The 300 Series stainless steel contains high proportions of chromium (Cr ≥ 18%) and nickel (Ni ≥ 8%), which forms a dense chromium oxide (Cr₂O₃) passive film on the pipe surface. This film can effectively resist corrosion from atmospheric exposure, fresh water, weak acids, and alkalis. For models containing molybdenum (Mo), such as 316 and 316L, the corrosion resistance to chloride ions is significantly enhanced—making them suitable for harsh environments like seawater transportation, coastal engineering, or chemical pipelines containing chloride media.
Good High-temperature & Low-temperature Stability: Most 300 Series grades have excellent temperature adaptability. For example, 304/304L can operate stably at temperatures below 430℃, while 321 (containing titanium Ti) and 347 (containing niobium Nb) can resist intergranular corrosion at high temperatures above 600℃, making them applicable to high-temperature fluid transportation scenarios (such as high-temperature steam pipelines in petrochemical plants). At low temperatures (down to -196℃), the 300 Series still maintains good toughness without brittle fracture, meeting the needs of low-temperature fluid transportation (e.g., liquefied natural gas (LNG) supporting pipelines).
Excellent Mechanical Properties: It has moderate tensile strength (≥ 485MPa for 304, ≥ 480MPa for 316L) and high elongation (≥ 40%), which can withstand certain external impacts and thermal expansion/contraction stresses. This ensures the pipe’s structural integrity in long-term use, especially in outdoor or large-span installation scenarios (e.g., cross-river water supply pipelines).
