ASME A234 WPB EQUAL TEE REDUCING TEE SOUR SERVICE

Pipe tee fittings are one of the most commonly used components in piping systems. Designed in a “T” shape, they feature one main run pipe and a 90° branch outlet, allowing efficient flow distribution or redirection.

ASTM A234 WPB Equal Tee and Reducing Tee are carbon steel butt weld fittings manufactured in accordance with ASME

Manufactured in accordance with ASME B16.9, these tees are available in equal (straight) tee and reducing tee configurations.

For sour service applications, ASTM A234 WPB tees can be supplied with controlled chemical composition, hardness limits, and additional testing to comply with NACE MR0175 / ISO 15156 requirements.

Equal Tee vs Reducing Tee

Equal Tee (Straight Tee)

• All three outlets have the same diameter

• Used where branch flow equals main flow

• Common in headers and distribution lines

Reducing Tee

• Branch outlet is smaller than the run pipe

• Used to connect smaller branch lines

• Reduces the need for additional reducers

Both types are manufactured to ASME B16.9 dimensional standards.

NACE MR 0175 is a Materials Standard issued by the National Association of Corrosion Engineers.It intended to assess the suitability of materials for oilfield equipment where sulphide (sulfide) stress corrosion cracking may be a risk in hydrogen sulphide (sour) environments. This standard specifies the types of corrosion resistant materials including stainless steels that can be used in specific oilfield environments and places limits on the hardness of the material.

NACE MR0175/ISO 15156 gives requirements and recommendations for the selection and qualification of carbon and low-alloy steels, corrosion-resistant alloys, and other alloys for service in equipment used in oil and natural gas production and natural gas treatment plants in H2S-containing environments, whose failure could pose a risk to the health and safety of the public and personnel or to the equipment itself.

Dimensions & Standards

• Material Standard: ASTM A234 WPB

• Fitting Standard: ASME B16.9

• Types: Equal Tee / Reducing Tee

• Size Range:

  • Equal Tee: 1/2″ – 48″

  • Reducing Tee: 3/4″ × 1/2″ – 48″ × 36″

• Wall Thickness: SCH 10, 20, 40, STD, XS, XXS

• Manufacturing: Seamless / Welded

To comply with the NACE MR 0175 requirement

A234 Gr. WPB SMLS Elbow should meet below  :197 HBW maximum hardness; In one of the following heat treat conditions:

hot-rolled
annealed
normalized
normalized and tempered
normalized-austenitized-quenched-and-tempered
austenitized-quenched-and-tempered

ASTM A234 WPB TEE Dimensions

Pipe Tee dimensions are covered in ASME B16.9. Refer to the table given below for the size 1/2″ to 48″. In piping, two types of tees are used, straight or equal and reducing tee. The following shall be checked during the inspection of Pipe Tee Dimensions.

• The diameter of the branch and run pipe
• The thickness of the tee
• Center to center dimension for branch
• Length of the tee.

All dimensions are in “mm” unless noted otherwise.
Equal Tee dimensions are as per ASME B16.9.

Nominal Pipe Size (NPS)	Outside Diameter at Bevel	Center-to-End
	D1	Run C	Outlet M
1/2	21.3	25	25
3/4	26.7	29	29
1	33.4	38	38
1(1/4)	42.2	48	48
1(1/2)	48.3	57	57
2	60.3	64	64
2(1/2)	73.0	76	76
3	88.9	86	86
3(1/2)	101.6	95	95
4	114.3	105	105
5	141.3	124	124
6	168.3	143	143
8	219.1	178	178
10	273.0	216	216
12	323.8	254	254
14	355.6	279	279
16	406.4	305	305
18	457	343	343
20	508	381	381
22	559	419	419
24	610	432	432
26	660	495	495
28	711	521	521
30	762	559	559
32	813	597	597
34	864	635	635
36	914	673	673
38	965	711	711
40	1016	749	749
42	1067	762	711
44	1118	813	762
46	1168	851	800
48	1219	889	838

ASTM A234 WPB Equal Tee ASME B16.9

How to order our A234 WPB Elbows NACE MR 0175 ?

example#1

 Related Products

• ASTM A234 WPB Concentric Reducers

• ASTM A234 WPB Elbows (45°, 90° LR / SR)

• ASTM A234 WPB Caps