ASTM A234 WPB 90 Degree Elbow Order

On May 15, 2025, an old customer from Singapore sent us an inquiry for ASTM A234 WPB 90 degree elbow. As a long-term trusted partner, we are well aware of the customer's stringent requirements for product quality and delivery cycle. The ASTM A234 WPB 90-degree elbows for this inquiry are indispensable key components in pipeline systems in industries such as oil, gas, and chemicals. The WPB grade indicates that these elbows are made of high-quality carbon steel, have excellent strength, pressure resistance, and weldability, and can withstand the test of complex working conditions such as high pressure and high temperature.

From the moment we received the inquiry, our sales, technical, and production teams worked closely together and quickly invested in product confirmation, production scheduling, and quality control. We strictly follow the ASTM A234 standard to ensure that every elbow meets the highest industry standards from raw material procurement to forging, forming, heat treatment, surface treatment, and final testing. Contact us

Inspection of 90 Degree Elbow

· Outside Diameter (O.D.): Measure at multiple points on both ends of the elbow to ensure that it is within the tolerance range specified in the standard.

· Wall Thickness (W.T.): Measure at multiple points on both ends of the elbow and the elbow body (especially on the outside and inside of the elbow, where the wall thickness may change during the forming process) to ensure that it is not less than the minimum allowable wall thickness.

· Tolerance Check: Compare all measured data with the corresponding tolerances specified in ASME B16.9 or other specified standards. ASME B16.9 clearly gives the allowed positive and negative deviations for each dimension.

· Marking Check: Check whether the markings of the elbow (such as material grade, manufacturer name or logo, furnace number, size, wall thickness grade, etc.) are clear, complete and meet the requirements of the standard.

Common Packaging Methods

1. Wooden Cases

Suitable for larger, heavier or more numerous elbows, providing sturdy protection and effectively resisting external impact.

2. Wooden Pallets:

For small and medium-sized elbows, they can be neatly stacked on wooden pallets and then fixed with steel straps, strapping tape or wrapping film. Convenient for forklift handling and stacking.

3. Woven Bags / Gunny Bags:

For small, light or fewer elbows, sturdy woven bags or gunny bags are sometimes used for bundling and packaging.

4. Bubble Wrap / Plastic Film / Foam:

These materials are often used for additional protection of the elbow surface to prevent scratches, wear and moisture intrusion. Before packing or palletizing, elbows may be wrapped with these materials individually or in batches.

Special Packaging - Felt

Additional shock absorption and cushioning: The soft material of felt can effectively absorb shock and vibration, reducing the bumps and scratches caused by the elbows during transportation.

Prevent surface damage: For elbows with special surface treatment (such as polishing, painting, coating), felt can provide a soft barrier to avoid scratches caused by direct friction with other objects or packaging materials.

Dust and moisture resistance (auxiliary): Although the main function is to prevent collision, felt can also block dust to a certain extent, and if combined with a waterproof film, it can also assist in moisture resistance.

Specification of ASME B16.9 90 Degree Elbow

Size Range	1/2" - 80" / DN15 - 2000
Thickness Schedule	SCH 10, 20, 40, STD, XS, 80, 100, 120, 140, 160, XXS
Standard	ANSI / ASME B16.9, MSS SP 43, JIS B2311/2312/2313, EN10253
Carbon Steel Grades	ASTM A234 WPB/WPC, A420 WPL6, A860 WPHY 42 / 46 / 56 / 60 / 65

90 Degree Elbow: Shape and Function

Long Radius (LR) 90 Degree Elbow: The center-to-end dimension (radius of curvature) is 1.5 times the nominal pipe size (1.5D). This is the most common type as it offers less pressure drop and turbulence due to a gentler change in direction, making it suitable for systems where flow efficiency is critical.

Short Radius (SR) 90 Degree Elbow: The center-to-end dimension is 1 times the nominal pipe size (1D). These are used in tight spaces where flow efficiency is less critical, or where space constraints dictate.

ASTM A234 WPB Elbow Chemical Composition

CHEMICAL

LIMITS

C

Mn

P

S

Si

Cr

Mo

Ni

Cu

Cb

V

ASTM A234 WPB

MIN

0.29

0.10

MAX

0.30

1.06

0.050

0.058

0.40

0.15

0.40

0.40

/

0.08

ASTM A234 WPB Elbow Mechanical Property

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %	R/A %	HARDNESS
ASTM A234 WPB	415 min	240 min	22 min	30 min	197 max

90 Degree Elbow Dimensions

DN	NPS	OD	A
			LR	SR
15	1/2	21.3	38	25
20	3/4	26.7	38	25
25	1	33.4	38	25
32	1-1/4	42.2	48	32
40	1-1/2	48.3	57	38
50	2	60.3	76	51
65	2-1/2	73.0	95	64
80	3	88.9	114	76
90	3-1/2	101.6	133	89
100	4	114.3	152	102
125	5	141.3	190	127
150	6	168.3	229	152
200	8	219.1	305	203
250	10	273.0	381	254
300	12	323.8	457	305
350	14	355.6	533	356
550	22	559.0	838	559
600	24	610.0	914	610
650	26	660.0	991	660
700	28	711.0	1067	711
750	30	762.0	1143	762
800	32	813.0	1219	813
850	34	864.0	1295	864
900	36	914.0	1372	914
950	38	965.0	1447	965
1000	40	1016.0	1524	1016
1050	42	1067.0	1600	1067
1100	44	1118.0	1676	1118
1150	46	1168.0	1753	1168
1200	48	1219.0	1829	1219
1300	52	1321.0	1981	1321
1400	56	1422.0	2134	1422
1500	60	1524.0	2286	1524
1600	64	1626.0	2438	1626
1700	68	1727.0	2591	1727
1800	72	1829.0	2743	1829
1900	76	1930.0	2896	1930
2000	80	2032.0	3048	2032

Applications

Oil & Gas: Refineries, pipelines, offshore platforms for crude oil, natural gas, and refined products.

Chemical & Petrochemical: Chemical processing plants, where moderate to high temperatures and pressures are common.

Power Generation: Thermal power plants, nuclear power plants for steam, water, and fuel lines.

Water Treatment: Industrial and municipal water treatment facilities.

Shipbuilding: Various piping systems on marine vessels.

Construction: Commercial and industrial building projects.