Can an ASTM A234 WPB Long Radius Bend be manufactured in standard and custom sizes?
These fittings get formed in various sizes per application needs, but around 50 to 214mm is standard. The wall thickness of an ASTM A234 WPB long radius bend ranges from 1.5 to 5mm, serving quite a range of pipelines. The degree of bending can also vary considerably. For example, you can get a long radius bend with a 180-degree curvature.
Most manufacturers can produce these fittings in customized sizes. Clients must specify the pipe diameter, the straight length, and the required curvature. Some mills also offer value-added services and protective coatings for resisting corrosion.
What is the heat treatment process for an A234 GR WPB butt weld LR bend?
The requirement for heat treatment depends on the production temperature. For example, an A234 GR WPB butt weld LR bend will not need additional treatment if produced between 1150 and 1800℉. But bends formed at temperatures over 1800℉ undergo annealing, normalization, and tempering.
The heat treatment involves cooling to a temperature below the critical range. Rapid cooling can lead to defects. It is why slow cooling gets preferred for superior chemical properties.
What are the specific applications of an A234 WPB carbon steel SCH 40 long radius bend in shipbuilding and marine industries?
The shipbuilding sector relies heavily on these fittings due to their inherent strength and corrosion resistance. An A234 WPB carbon steel SCH 40 long radius bend also shows formability and weldability, helping it adapt to piping needs in marine engineering projects. The specific applications include:
ASTM A234 WPB Long Radius Bend specification
| Bend Type | Wall thickness | Manufacturing process |
|---|---|---|
| Long Radius | SCH 5 to SCH XXS |
|
| Material | Bending methods | Sizes |
| ASTM A234 WPB |
|
|
| Schedule | Surface treatment | Value Added Services by Mesta Inc |
| Sch 5 to Sch XXS |
|
|
| Bends Radii | Types | Delivery Time |
| 75 / 100 / 250 / 300 / 500 / 800 / 1,000 / 1,500 mm |
|
7-14 days |
Types of ASTM A234 WPB long radius bend
ASTM A234 WPB sch 40 long radius bend
A234 gr WPB butt weld lr bend
A234 WPB std 90 long radius bend
Grade WPB seamless long radius bend
SA 234 WPB welded long radius bend dimensions
| Nominal Pipe Size |
Outside Diameter |
Inside Diameter |
Wall Thickness |
Center To End |
Pipe Schedule |
Weight Pounds |
| 1/2 | 0.84 | 0.622 | 0.109 | 1.5 | 40 | 0.16 |
| 3/4 | 1.05 | 0.824 | 0.113 | 1.5 | 40 | 0.17 |
| 1 | 1.32 | 1.049 | 0.133 | 1.5 | 40 | 0.4 |
| 1 1/4 | 1.66 | 1.38 | 0.14 | 1.88 | 40 | 0.55 |
| 1 1/2 | 1.9 | 1.61 | 0.145 | 2.25 | 40 | 0.8 |
| 2 | 2.38 | 2.07 | 0.154 | 3 | 40 | 1.6 |
| 2 1/2 | 2.88 | 2.47 | 0.203 | 3.75 | 40 | 3.2 |
| 3 | 3.5 | 3.07 | 0.216 | 4.5 | 40 | 4.8 |
| 3 1/2 | 4 | 3.55 | 0.226 | 5.25 | 40 | 6.6 |
| 4 | 4.5 | 4.03 | 0.237 | 6 | 40 | 8.9 |
| 5 | 5.56 | 5.05 | 0.258 | 7.5 | 40 | 15.1 |
| 6 | 6.62 | 6.07 | 0.28 | 9 | 40 | 24 |
| 8 | 8.62 | 7.98 | 0.322 | 12 | 40 | 47.8 |
| 10 | 10.75 | 10.02 | 0.365 | 15 | 40 | 83.4 |
| 12 | 12.75 | 12 | 0.375 | 18 | * | 123 |
| 14 | 14 | 13.25 | 0.375 | 21 | 30 | 155 |
| 16 | 16 | 15.25 | 0.375 | 24 | 30 | 206 |
| 18 | 18 | 17.25 | 0.375 | 27 | * | 262 |
| 20 | 20 | 19.25 | 0.375 | 30 | 20 | 324 |
| 24 | 24 | 23.25 | 0.375 | 36 | 20 | 466 |
| 30 | 30 | 29.25 | 0.375 | 45 | * | 720 |
| 36 | 36 | 35.25 | 0.375 | 54 | * | 1,039 |
| 42 | 42 | 41.25 | 0.375 | 63 | * | 1,420 |
| 48 | 48 | 47.25 | 0.375 | 72 | * | 2,000 |
Which types of tests are typically performed on an ASTM A234 WPB SCH 40 long radius bend?
Careful testing of these components is essential for optimal system performance in key sectors like chemical processing and power generation. The typical tests performed on an ASTM A234 WPB SCH 40 long radius bend are hydrostatic testing, ultrasonic examination, and magnetic particle inspection. Mills check other properties like tensile strength, corrosion resistance, and hardness.
Manufacturers will share these test reports in a Mill Test Certificate (MTC) and a radiography report. Additional tests are also possible through third parties and laboratories.
What is the fabrication process for a Grade WPB carbon steel long radius bend?
Manufacturers conduct standard fabrication using techniques like flanging or bending. A hydraulic CNC press brake performs the fabrication. It clamps between a punch and a die, creating a curve. The objective is to make the desired fitting for the specification by combining mechanical forces, machining, and assembling.
More alternatives exist for a Grade WPB carbon steel long radius bend – soldering and electro-polishing, among others.
How do SA 234 WPB welded long radius bends impact the flow characteristics and efficiency of a piping system?
As a rule of thumb, a longer radius in a bend creates a smoother flow in the pipeline. When you use a carbon steel ASTM A234 WPB seamless long radius bend, you will experience a consistent fluid flow that will not induce sudden turbulence or abrupt pressure drops. It is an excellent option to enhance the overall flow characteristics.
An SA 234 WPB welded long radius bend provides tolerance for medium to high temperatures and resists impact. While the prime goal of this fitting is to change the direction of the fluid, it can help minimize inefficiencies in the pipeline.