China WP11-S ASTM A234 180 Degree U Bend For High Temperature And Pressure Application for sale

WP11-S ASTM A234 180 Degree U Bend For High Temperature And Pressure Application

Price Negotiable

Price: Negotiable

MOQ: 1 PC

Delivery Time: Generally within 30 Days

Brand: YuHong

Product Description

WP11-S ASTM A234 180 Degree U Bend For High Temperature And Pressure Application

Product Specifications

Attribute	Value
Product Name	180 Degree Return Bend
Specification	ASTM A234
Material	WP11-S
Radius	LR or SR (Depend on Customer's Requirements)
Surface	Black Painted or Oiled
Test	Size Inspection, Visual Inspection, NDE Test...
Size Standard	ASME B16.9
Application	Heat Exchangers, Piping Systems, Oil and Gas Industry, Water Treatment

Product Description

ASTM A234 WP11-S 180 Degree U Bend For High Temperature and Pressure Application

A 180-degree U-bend is a pipe fitting that curves back on itself in a semi-circular or U-shaped pattern, changing the flow direction by 180 degrees. It is commonly used in piping systems where space constraints or thermal expansion management require a tight directional reversal.

Key Features of a 180° U-Bend

Shape & Geometry - Forms a complete half-circle (U-shape). Bend Radius (R): Specified as a multiple of the pipe diameter (e.g., 1.5D, 2D, 3D, where D = pipe diameter). Example: A 2D bend on a 6-inch pipe has a 12-inch centerline radius.
Types of U-Bends - Short Radius (1D): Tightest bend, used where space is limited. Long Radius (1.5D or more): Smoother flow, less pressure drop. Custom Radii: Engineered for specific applications.
Manufacturing Methods - Hot Induction Bending: Heated and bent for thick-walled pipes. Cold Bending: Used for smaller pipes with thinner walls. Mandrel Bending: Ensures smooth interior without wrinkles.
Materials - Carbon steel (e.g., ASTM A234 WPB), Alloy steel (e.g., ASTM A234 WP11, WP22), Stainless steel (e.g., ASTM A403 WP316), Nickel alloys (e.g., Inconel, Monel)
End Connections - Plain Ends (PE): For welding. Beveled Ends (BE): Prepared for butt welding. Threaded Ends (TE): For screw connections.

Why Use a 180° U-Bend Instead of Two 90° Bends?

Fewer Welds: Reduces leak risks.
Lower Pressure Drop: Smoother flow than two 90° elbows.
Space Efficiency: Compact design for tight layouts.

ASTM A234 WP11 Chemical Composition (%)

Element	WP11 Class 1	WP11 Class 2	WP11 Class 3
Carbon (C)	0.05-0.15	0.05-0.20	0.05-0.20
Manganese (Mn)	0.30-0.60	0.30-0.80	0.30-0.80
Phosphorus (P)	≤ 0.030	≤ 0.030	≤ 0.030
Sulfur (S)	≤ 0.030	≤ 0.030	≤ 0.030
Silicon (Si)	0.50-1.00	0.50-1.00	0.50-1.00
Chromium (Cr)	1.00-1.50	1.00-1.50	1.00-1.50
Molybdenum (Mo)	0.44-0.65	0.44-0.65	0.44-0.65
Nickel (Ni)	≤ 0.50	≤ 0.50	≤ 0.50
Vanadium (V)	-	-	≤ 0.03
Columbium (Cb)	-	-	≤ 0.08

ASTM A234 WP11 Mechanical Properties

Property	WP11 Class 1	WP11 Class 2	WP11 Class 3
Tensile Strength (MPa)	≥ 415	≥ 485	≥ 485
Yield Strength (MPa)	≥ 205	≥ 275	≥ 275
Elongation (%) (min)	20	20	20
Hardness (HB) (max)	197	197	197

Notes:

WP11 Class 1: Standard grade with lower strength.
WP11 Class 2 & 3: Higher strength due to modified heat treatment (Class 3 includes micro-alloying elements like V and Cb).
Suitable for high-temperature service (e.g., power plants, refineries).

Applications of A234 WP11-S 180° U-Bend

Power Plants - Used in boiler systems, steam lines, and heat exchangers due to its high-temperature resistance. Suitable for thermal expansion loops to absorb pipe stress.
Oil & Gas Refineries - Employed in crude oil processing, petrochemical pipelines, and high-pressure gas lines where corrosion resistance is critical.
Chemical Processing Plants - Resists sulfur compounds, acidic, and alkaline environments (thanks to chromium-molybdenum alloy).
High-Temperature Steam Systems - Used in steam distribution networks (up to 593°C / 1100°F for WP11).
Heating & Cooling Systems - Functions in heat recovery systems, condensers, and district heating pipelines.