Elbow

ASTM A234

This specification covers wrought carbon steel & alloy steel fittings of seamless and welded construction. Unless seamless or welded construction is specified in order, either may be furnished at the option of the supplier. All welded construction fittings as per this standard are supplied with 100% radiography. Under ASTM A234, several grades are available depending upon chemical composition. Selection would depend upon pipe material connected to these fittings.

Tensile Requirements	WPB	WPC, WP11CL2	WP11CL1	WP11CL3
Tensile Strength, min, ksi[MPa]	60-85	70-95	60-85	75-100
(0.2% offset or 0.5% extension-under-load)	[415-585]	[485-655]	[415-585]	[520-690]
Yield Strength, min, ksi[MPa]	32	40	30	45
	[240]	[275]	[205]	[310]

Some of the grades available under this specification and corresponding connected pipe material specification are listed below:

ASTM A403

This specification covers two general classes, WP & CR, of wrought austenitic stainless steel fittings of seamless and welded construction.
Class WP fittings are manufactured to the requirements of ASME B16.9 & ASME B16.28 and are subdivided into three subclasses as follows:

• WP – SManufactured from seamless product by a seamless method of manufacture.
• WP – W These fittings contain welds and all welds made by the fitting manufacturer including starting pipe weld if the pipe was welded with the addition of filler material are radiographed. However no radiography is done for the starting pipe weld if the pipe was welded without the addition of filler material.
• WP-WX These fittings contain welds and all welds whether made by the fitting manufacturer or by the starting material manufacturer are radiographed.

Class CR fittings are manufactured to the requirements of MSS-SP-43 and do not require non-destructive examination.

Under ASTM A403 several grades are available depending upon chemical composition. Selection would depend upon pipe material connected to these fittings. Some of the grades available under this specification and corresponding connected pipe material specification are listed below:

ASTM A420

This specification covers wrought carbon steel and alloy steel fittings of seamless & welded construction intended for use at low temperatures. It covers four grades WPL6, WPL9, WPL3 & WPL8 depending upon chemical composition. Fittings WPL6 are impact tested at temp – 50° C, WPL9 at -75° C, WPL3 at -100° C and WPL8 at -195° C temperature.

The allowable pressure ratings for fittings may be calculated as for straight seamless pipe in accordance with the rules established in the applicable section of ASME B31.3.

The pipe wall thickness and material type shall be that with which the fittings have been ordered to be used, their identity on the fittings is in lieu of pressure rating markings.

Steel No.	Type	Chemical composition
		C	Si	S	P	Mn	Cr	Ni	Mo	Other	ób	ós	δ5	HB
WPL6	0.3	0.15-0.3	0.04	0.035	0.6-1.35	0.3	0.4	0.12	Cb:0.02;V:0.08	415-585	240	22
WPL9	0.2		0.03	0.03	0.4-1.06		1.6-2.24			435-610	315	20
WPL3	0.2	0.13-0.37	0.05	0.05	0.31-0.64		3.2-3.8			450-620	240	22
WPL8	0.13	0.13-0.37	0.03	0.03	0.9		8.4-9.6			690-865	515	16

 Light Oiling, Black Painting, Galvanizing, PE /3PE Anti-corrosion Coating

Packed in Wood Cabins/Wood Tray

Steel Pipe Elbow Packing Requirements

We focus on every procedure to assure quality, the package we usually take is pack the steel pipe elbows with environmental poly bags, and then in free fumigation wooden cases or wooden palte. We also accept customized package such as OEM by negotiation.

1. Material shall be packed ready for export in a manner which alows easy handing and prevents damage. Vendor shall submit their standard packing procedure to purchaser for approval.

2. Open ends of ftingsg and flanges shall be supplied with heawy duty plastic protectve plugs or caps. For belled ends, the caps shall protect the full area of the bevel.

3. Water proof barrier material shall be used for stainless steel materials to protect against chlorine attack by exposure to salt water atmosphere.

4. Carbon steel and stainless steel items are not alowed to be stored together and shall be packed separately.

We supply a comprehensive range of steel pipe fittings designed to connect, control, change direction, or branch off piping systems. Our main product categories include:
Elbows (90°, 45°, 180°): Used to change the direction of the pipe flow.
Tees (Equal, Reducing): Used to combine or split fluid flow.
Reducers (Concentric, Eccentric): Used to connect pipes of different diameters.
Caps: Used to seal the end of a pipe.
Couplings & Unions: Used to connect two pipes in a straight line.
Crosses: Four-way fittings used in fire sprinkler systems and other specific applications.
We manufacture these fittings in various materials including Carbon Steel, Stainless Steel (304/316), and Alloy Steel.

Our steel pipe fittings are manufactured in strict compliance with international standards to ensure compatibility and safety in global projects. Key standards include:
ASME/ANSI B16.9: Factory-made wrought buttwelding fittings.
ASME/ANSI B16.11: Forged fittings, socket-welding, and threaded.
MSS SP-75: Specification for high-test, wrought, buttwelding fittings.
DIN / EN: European standard fittings (e.g., DIN 2605, DIN 2616).
JIS B2311/B2312: Japanese Industrial Standards.
GB/T 12459: Chinese national standard for steel pipe fittings.

Choosing the right connection type is critical for your piping system's integrity:
Buttweld Fittings: Welded directly to the pipe. They provide a permanent, leak-proof connection and are ideal for high-pressure and high-temperature applications. They are commonly used in industrial pipelines.
Socket Weld Fittings: The pipe is inserted into a recessed area of the fitting before welding. These are typically used for small-bore piping (usually under 2 inches) and high-pressure systems where disassembly is not required.
Threaded (Screwed) Fittings: These have internal or external threads and are screwed onto the pipe. They are easy to install and disassemble, making them suitable for low-pressure water lines or maintenance-heavy areas, but not recommended for high vibration or high temperature environments.

We offer fittings in a wide range of grades to suit different environments:
Carbon Steel: ASTM A234 WPB (most common for general use), WPC, and low-temperature carbon steel (ASTM A420 WPL6).
Stainless Steel: ASTM A403 WP304/L, WP316/L, WP310, WP321, etc., ideal for corrosive environments and food processing.
Alloy Steel: ASTM A234 WP11, WP22, WP91, designed for high-temperature and high-pressure service (e.g., power plants).
Duplex & Super Duplex: For extreme corrosion resistance applications (offshore oil & gas).

Yes, we specialize in both standard and custom manufacturing.
OEM Services: We can produce fittings according to your specific drawings or samples, including non-standard sizes or special beveling.
Custom Coatings: We can apply epoxy coating, galvanization, or oil varnish based on your project's corrosion protection requirements.
MOQ: For standard items, we have flexible MOQs. For custom forged or machined parts, the Minimum Order Quantity (MOQ) depends on the complexity of the production run.