Seamless Nickel Alloy Pipe & Tube
When absolute structural integrity and maximum pressure containment are non-negotiable, seamless tubulars are the only choice. Extruded and pierced from solid nickel alloy billets, 28Nickel's seamless pipes and tubes eliminate the vulnerabilities associated with weld seams. They are engineered to deliver unmatched reliability in severe chemical reactors, deep-water oil & gas extraction, and critical aerospace hydraulic systems.
Available Alloy Grades for Seamless Pipe & Tube
The aggressive nature of high-temperature corrosive fluids demands a homogenous material structure. We supply seamless tubular products in the world's highest-performing superalloys, ensuring uniform corrosion resistance across the entire length of the pipe.
グレードを選択すると、材料仕様が表示されます：
Engineering Advantages of Seamless Construction
Unlike welded alternatives, seamless pipes and tubes possess a continuous, uniform grain structure, offering distinct advantages in critical applications.
Maximum Pressure Ratings
Without a longitudinal weld seam (which is traditionally the weakest point under hoop stress), seamless pipes can withstand working pressures typically 20% higher than welded pipes of the same dimensions and alloy.
Homogeneous Corrosion Resistance
The absence of a weld Heat-Affected Zone (HAZ) means there are no localized metallurgical changes. This provides absolute uniformity in resisting localized pitting and intergranular corrosion.
Precision Dimensional Tolerances
Cold-drawn seamless tubes offer incredibly tight tolerances on the Outside Diameter (OD) and Wall Thickness (WT), making them essential for proper insertion and expansion into heat exchanger tube sheets.
Primary Seamless Tubular Products
Heat Exchanger & Condenser Tubes
Manufactured to strict OD and WT specifications (e.g., ASTM B163). Engineered for efficient thermal transfer while surviving aggressive cooling media like seawater or sulfuric acid.
Instrumentation Tubing
Small-diameter, high-precision tubing (available in straight lengths or coils). Utilized for hydraulic control lines, pressure gauges, and chemical injection umbilicals in offshore platforms.
Heavy-Wall Process Piping
Large Nominal Pipe Size (NPS) seamless pipes in heavy schedules (Sch 80, Sch 160, XXH). Designed for the main arteries of chemical plants handling high-temperature, high-pressure corrosive fluids.
OCTG / Downhole Tubulars
Oil Country Tubular Goods (OCTG) utilized deep underground. Formed from high-strength superalloys (like インコネル718) to resist sour gas (H2S), extreme bottom-hole pressure, and chloride stress cracking.
| 仕様カテゴリー | 詳細と規格 |
|---|---|
| 標準仕様 | ASTM B163 (Condenser/Heat Exchanger Tube), ASTM B165 (Monel Seamless), ASTM B167 / B444 (Inconel Seamless), ASTM B622 (Hastelloy Seamless) |
| Pipe Size Range (NPS) | 1/8" NB to 24" NB (Schedules: 10S, 40S, 80S, 160, XXH) |
| Tube Size Range (OD) | 1/16" OD to 8" OD (Wall Thickness: 0.010" to 0.500"+) |
| Delivery Conditions | Annealed & Pickled, Bright Annealed, Cold Drawn, Extruded |
| 非破壊検査 (NDT) | 100% Hydrostatic Testing, Eddy Current Testing (ECT), Ultrasonic Testing (UT) |
Need Seamless Reliability?
Specify whether you need Pipe (NPS & Schedule) or Tube (OD & Wall Thickness), along with your required alloy grade (e.g., seamless Hastelloy C276 tube). We provide full material traceability and カスタム cut-to-length services.
Get a Seamless Pipe/Tube Quote