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In search of a credible source of alloy steel seamless pipes. This reference includes all the information you require, the Alloy Steel Seamless Pipe Weight Chart and dimensional specifications, chemical composition, mechanical properties and ASTM A335 tolerances are all available. It is used to calculate the material, cost, and high-temperature service applications of engineers, fabricators and industrial buyers with accuracy.
The strength, creep resistance and high temperature performance of alloy steel seamless pipes have made them very popular in power plants, refineries, petrochemical processing and boiler systems. The weight chart in kg and mm allows rapid planning of materials and estimation of the project.
What is an Alloy Steel Seamless Pipe Weight Chart?
Alloy Steel Seamless Pipe Weight Chart in Kg and mm is a reference table that is applied to calculate the theoretical weight of pipes based on:
Nominal Pipe Size (NPS)
Schedule/Thickness (mm)
Outer Diameter (mm)
Alloy steel density (average density of 7.85 g/cm3)
This chart is used by engineers, procurement teams, and fabricators to estimate shipping weight, pressure ratings, and project costing due to the use of high-temperature applications.
The formula of calculation is usually general and is as follows:
Weight
Alloy Steel Seamless Pipe weight chart in PDF format is also requested by many buyers to have quick access to the procurement and site planning.
Alloy steel seamless pipes specifications.
The technical standards of alloy steel seamless pipes should be known before considering the dimensional and weight data.
Alloy Steel seamless pipe Grade Specifications.
Alloy steel seamless pipes meet some of the most important international standards that guarantee quality, high-temperature and reliability in power and petrochemical industries of the globe.
| Standard | Specification |
| ASTM | ASTM A335 |
| ASME | SA 335 |
| Common Grades | P5, P9, P11, P22, P91 |
| Type | Seamless Ferritic Alloy Steel |
These standards define manufacturing requirements for high-temperature service, chemical limits, and mechanical performance
Chemical Properties of Common Alloy Steel Seamless Pipes
The chemical composition ensures high-temperature strength and creep resistance.
| Grade | C (max) | Cr | Mo | Mn | Si (max) | P (max) | S (max) |
| P5 | 0.15 | 4.0-6.0 | 0.45-0.65 | 0.30-0.60 | 0.50 | 0.025 | 0.025 |
| P9 | 0.15 | 8.0-10.0 | 0.90-1.10 | 0.30-0.60 | 0.50 | 0.025 | 0.025 |
| P11 | 0.05-0.17 | 1.0-1.5 | 0.44-0.65 | 0.30-0.60 | 0.50-1.00 | 0.025 | 0.025 |
| P22 | 0.05-0.15 | 1.90-2.60 | 0.87-1.13 | 0.30-0.60 | 0.50 | 0.025 | 0.025 |
| P91 | 0.08-0.12 | 8.0-9.5 | 0.85-1.05 | 0.30-0.60 | 0.20-0.50 | 0.020 | 0.010 |
Chromium and molybdenum content provides excellent creep resistance at elevated temperatures
Mechanical Properties of Alloy Steel Seamless Pipes
Mechanical strength is critical for high-pressure, high-temperature service conditions.
| Grade | Tensile Strength (MPa min) | Yield Strength (MPa min) | Elongation (% min) |
| P5 | 415 | 205 | 30 |
| P9 | 415 | 205 | 30 |
| P11 | 415 | 205 | 30 |
| P22 | 415 | 205 | 30 |
| P91 | 585 | 415 | 20 |
These properties make alloy steel seamless pipes suitable for power generation and petrochemical applications
Dimensional Chart of Seamless Pipe Alloy Steel.
Alloy steel Seamless Pipe Dimensional Chart represents usual schedules and sizes that are maximized to serve high pressure. These dimensions are based on the ASME B36.10 standards and are commonly in inventory to use in boiler, superheater and heat exchange projects. The most typical are Schedule 40 and 80 but heavier schedules (120, 160) are used in high-pressure service which is always checked with the suppliers regarding the specific project needs.
| NPS (inch) | OD (mm) | Schedule 40 WT (mm) | Schedule 80 WT (mm) | Schedule 160 WT (mm) |
| 1/2″ | 21.3 | 2.77 | 3.73 | 4.78 |
| 1″ | 33.4 | 3.38 | 4.55 | 6.35 |
| 2″ | 60.3 | 3.91 | 5.54 | 8.74 |
| 4″ | 114.3 | 4.50 | 6.02 | 11.1 |
| 6″ | 168.3 | 5.49 | 7.11 | 14.3 |
| 8″ | 219.1 | 6.23 | 8.18 | 16.6 |
| 10″ | 273.1 | 6.35 | 9.27 | 21.4 |
| 12″ | 323.9 | 6.35 | 10.3 | 25.4 |
Custom schedules and lengths up to 13.5 meters are available
Alloy Steel Seamless Pipe Weight Chart (Kg/m)
Below is the Alloy Steel Seamless Pipe Weight Chart in Kg/m for common grades and schedules.
| NPS (inch) | Schedule 40 (kg/m) | Schedule 80 (kg/m) | Schedule 160 (kg/m) |
| 1/2″ | 1.27 | 1.69 | 2.12 |
| 1″ | 2.50 | 3.23 | 4.32 |
| 2″ | 5.44 | 7.45 | 11.3 |
| 4″ | 10.8 | 14.2 | 25.0 |
| 6″ | 18.97 | 24.4 | 47.9 |
| 8″ | 28.3 | 36.7 | 70.9 |
| 10″ | 40.5 | 56.0 | 120 |
| 12″ | 53.8 | 86.0 | 200 |
Weight values are theoretical based on 7.85 g/cm³ density
ASTM A335 Alloy Steel Pipe Tolerances
According to ASTM A335/A530, tolerances for seamless pipes vary by size and manufacturing method:
- OD ≤ 101.6 mm: +0.4/-0.8 mm (hot rolled)
- OD 25.4-50.8 mm: ±0.20 mm (cold drawn)
- Wall Thickness: +12.5%/-0% for most sizes
Length tolerances: Single random (4.8-6.7m), Double random (9.1-12.5m)
Alloy Steel Seamless Pipe Weight Chart in PDF
Many engineers and procurement managers prefer downloading the Alloy Steel Seamless Pipe weight chart in PDF for:
- On-site fabrication reference
- Pressure rating calculations
- Shipping weight estimation
- Boiler/tender documentation
A printable PDF version typically includes:
- Dimensional chart by schedule
- Weight calculation formula
- ASTM A335 tolerances
- Chemical and mechanical properties by grade
Conclusion
For petrochemical fabricators, procurement professionals, and power plant engineers, the Alloy Steel Seamless Pipe Weight Chart is a crucial technical tool. Accurate material planning, cost estimation, and adherence to ASTM A335 standards for high-temperature service are all supported.In the harshest industrial settings, these seamless pipes provide dependable strength, creep resistance, and lifespan thanks to their demonstrated performance in Grades P5, P9, P11, P22, and P91.