ASME B16.11 SS Forged Tee

ASME B16.11 SS forged tee, with their advantages of high strength, corrosion resistance, and strong adaptability, have become the core components for pipeline diversion or merging in fields such as petroleum, chemical, food and medicine, providing reliable connection solutions for various industrial scenarios.

Stainless Steel Forged Tee

Stainless steel forged tees are pipeline fittings processed through forging technology. Their core structure includes a main pipeline interface and a branch interface (or two branch interfaces, namely reducing tees), which can realize the diversion, merging or flow direction change of the medium in the pipeline.

Types of ASME B16.11 SS Forged Tee

ASME B16.11 SS forged tee follow standardized design, with dimensional parameters strictly in accordance with international or industry standards, ensuring seamless connection with various pipelines and valves. Common nominal diameters range from 1/8 inch (DN6) to 4 inches (DN100), with pressure ratings of Class 2000, 3000, 6000, and 9000.

Stainless steel forged tee can be divided into socket weld tee and threaded tee according to the connection method. The two have significant differences in connection principles and applicable scenarios, and their specific characteristics are compared as follows:

Compare	Socket Weld Tee	Threaded Tee
Connect	The pipeline is inserted into the socket of the three-way interface and fixed by socket welding to form a complete connection structure.	The inner wall of the three-way interface is processed with internal threads and connected to pipes with external threads through threads. It is necessary to use raw tape and sealant to enhance the sealing performance.
Pressure	Class3000、6000、9000。	Class2000、3000、6000。
Temperature	The welded structure has excellent high temperature resistance and can be stably used within the range of -196 ℃ to 600 ℃, suitable for high-temperature medium pipelines.	Threaded sealing materials (such as raw tape) have poor high temperature resistance and are mostly suitable for normal and medium low temperature scenarios ranging from -20 ℃ to 150 ℃.
Sealing Reliability	After welding, the interface is integrated with the pipeline, with no leakage hazards and strong long-term stability. It can be used for pipelines containing flammable, explosive, and toxic media.	Relying on thread accuracy and sealing materials, long-term exposure to vibration and temperature changes can lead to seal aging and leakage risks.
Installation and Maintenance	Professional welders are required for operation, and weld seam testing (penetration testing, radiographic testing) is required after installation. Disassembly requires cutting, resulting in high maintenance costs.	No welding equipment is required, it can be assembled manually or with the help of tools, and can be flexibly disassembled for easy pipeline maintenance and accessory replacement.

Stainless Steel Forged Socket Weld Tee

Socket weld tee is a high-pressure tee pipe connection accessory mainly formed by forging blanks from round steel or steel ingots, and then processed by lathe machine. They are T-shaped and can be divided into equal tees and reducing tees. Shanghai Zhucheng Pipe Fitting Manufacturing Co., Ltd. specializes in the production and sales of American standard ASME B16.11 socket weld tees, with specifications ranging from 1/8 "to 4" and pressures of Class 3000, 6000, and 9000. The commonly used materials are ASTM A105 carbon steel and A182 stainless steel.

Specification

Types	Equal and Reducing Socket Weld Tee
Size	1/8"- 4" / DN6 - DN100
Pressure	Class 3000, 6000, 9000.
Stainless Steel	ASTM A182 F304 / 304L / 304H, 316 / 316L, 321, 310S, 317, 347, 904L
Duplex Stainless Steel	ASTM A182 F51, F53, F44

Dimension of Socket Weld Tee

DN	NPS	B	D			C						Gmin			J min	A
			3000	6000	9000	3000		6000		9000		3000	6000	9000		Tee
						ave	min	ave	min	ave	min					3000	6000	9000
6	1/8	10.9	6.1	3.2	-	3.18	3.18	3.96	3.43	-	-	2.41	3.15	-	9.5	11	11	-
8	1/4	14.3	8.5	5.6	-	3.78	3.3	4.6	4.01	-	-	3.02	3.68	-	9.5	11	13.5	-
10	3/8	17.7	11.8	8.4	-	4.01	3.5	5.03	4.37	-	-	3.2	4.01	-	9.5	13.5	13.5	-
15	1/2	21.9	15	11	5.6	4.67	4.09	5.97	5.18	9.53	8.18	3.73	4.78	7.47	9.5	15.5	19	25.5
20	3/4	27.3	20.2	14.8	10.3	4.90	4.27	6.96	6.04	9.78	8.56	3.91	5.56	7.82	12.5	19	22.5	28.5
25	1	34.0	25.9	19.9	14.4	5.69	4.98	7.92	6.93	11.38	9.96	4.55	6.35	9.09	12.5	22.5	27	32
32	1 ¼	42.8	34.3	28.7	22	6.07	5.28	7.92	6.93	12.14	10.62	4.85	6.35	9.7	12.5	27	32	35
40	1 ½	48.9	40.1	33.2	27.2	6.35	5.54	8.92	7.80	12.70	11.12	5.08	7.14	10.15	12.5	32	38	38
50	2	61.2	51.7	42.1	37.4	6.93	6.04	10.92	9.50	13.84	12.12	5.54	8.74	11.07	16	38	41	54
65	2 ½	73.9	61.2	-	-	8.76	7.62	-	-	-	-	7.01	-	-	16	41	-	-
80	3	89.9	76.4	-	-	9.52	8.30	-	-	-	-	7.62	-	-	16	57	-	-
100	4	115.5	100.7	-	-	10.69	9.35	-	-	-	-	8.56	-	-	19	66.5	-	-

Weight List (KG)

DN	NPS	3000	6000	9000
6	1/8	0.13	0.22	-
8	1/4	0.14	0.25	-
10	3/8	0.16	0.45	-
15	1/2	0.35	0.55	1.15
20	3/4	0.48	0.90	1.80
25	1	0.66	1.46	2.25
32	1-1/4	1.00	1.90	3.95
40	1-1//2	1.40	2.80	4.87
50	2	2.00	3.70	8.89
65	2-1/2	4.10	-	-
80	3	5.55	-	-
100	4	15.6	-	-

ASEM B16.11 Stainless Steel Threaded Tee

Threaded tee is a type of forged pipe fitting with a T-shaped shape, and is the most common type of threaded pipe fitting. According to the different export diameters, it is also divided into two types: equal tees and reduced tees. Equal tee, also known as straight tee, has three outlets with the same outer diameter. The main pipe of the different diameter tee has the same connecting size, while the connecting size of the branch pipe is smaller than that of the main pipe. Common thread forms include NPT, BSPP, etc.

Specification

Type	Equal Tee and Reducing Threaded Tee
Size	1/8"- 4" / DN6 - DN100
Class	2000, 3000, 6000, 2M, 3M, 6M
Grade	ASTM A105, A350 LF2, A182 F304 / F316 / F51, F53, F11, F22

Dimension of Threaded Tee

DN	NPS	A			H
		2000LB	3000LB	6000LB	2000LB	3000LB	6000LB
6	1/8	21	21	25	22	22	25
8	1/4	21	25	28	22	25	33
10	3/8	25	28	33	25	33	38
15	1/2	28	33	38	33	38	46
20	3/4	33	38	44	38	46	56
25	1	38	44	51	46	56	62
32	1 1/4	44	51	60	56	62	75
40	1 1/2	51	60	64	62	75	84
50	2	60	64	83	75	84	102
65	2 1/2	76	83	95	92	102	121
80	3	86	95	106	109	121	146
100	4	106	114	114	146	152	152

Weight List(KG)

NOMINAL SIZE		THREADED PIPE TEE WEIGHT
DN	NPS	2000	3000	6000
6	1/8	0.13	0.22	0.35
8	1/4	0.13	0.22	0.57
10	3/8	0.16	0.40	0.66
15	1/2	0.35	0.58	1.15
20	3/4	0.45	0.90	1.80
25	1	0.66	1.46	2.25
32	1-1/4	1.00	1.90	3.95
40	1-1/2	1.40	3.40	4.87
50	2	2.20	3.80	8.89
65	2-1/2	4.20	7.20	12.8
80	3	6.15	10.7	21.6
100	4	14.7	17.9	29.5

ASME B16.11 Pressure Ratings for Forged Fittings

ASME B16.11 specifies the pressure range for socket and threaded fittings. Pressure range of socket fittings: CLASS3000, 6000, 9000; Pressure range of threaded fittings: CLASS2000, 3000, 6000.

CLASS OF THE FITTINGS VS THE GRADE OF THE CONNNECTING PIPES

Joint Type

Class

Grade of Connecting Pipes

Joint Type

Class

Grade of Connecting Pipes

SW

3000

Sch80   XS

THRD

2000

Sch80   XS

6000

Sch160

3000

Sch160

9000

XXS

6000

XXS

ASTM A182 SS Forged Tee

The material selection for stainless steel forged tee must comply with internationally recognized standards to ensure stable performance and controllable quality. The ASTM A182 material standard is the most common. ASTM A182 is an American Society for Testing and Materials standard that covers forged stainless steel fittings for high temperature applications. Commonly used materials are ASTM A182 F304, F316, and F321.

ASTM A182 F304 stainless steel: containing 18% -20% chromium and 8% -11% nickel, with a tensile strength of ≥ 515MPa and a yield strength of ≥ 205MPa at room temperature, possessing excellent oxidation resistance and neutral corrosion resistance;

Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	N
ASTM A182 F304	MIN						8.00	18.00
	MAX	0.08	2.00	0.045	0.030	1.00	11.00	20.00	0.10

Mechanical Properties

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %	R/A %
ASTM A182 F304	515 min	205 min	30 min	50 min

ASTM A182 F316 stainless steel: Adding 2% -3% molybdenum element on the basis of 304 greatly improves corrosion resistance, especially excellent resistance to strong corrosive media such as seawater, saltwater, and acid solutions (such as dilute sulfuric acid and phosphoric acid), with tensile strength ≥ 515MPa and yield strength ≥ 205MPa;

Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N
ASTM A182 F316	MIN						10.0	16.0	2.00
	MAX	0.08	2.00	0.045	0.030	1.00	14.0	18.0	3.00	0.10

Mechanical Properties

MATERIAL	ASTM A182 F316
T.S (MPA)	515 min
Y.S (MPA)	205 min
EL %	30 min
R/A %	50 min

ASTM A182 F321 stainless steel: Adding titanium element suppresses the precipitation of chromium carbides, avoiding intergranular corrosion after welding, and has better high  resistance than F304 material.

Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N	Ti
ASTM A182 F321	MIN						9.00	17.00			5(C+N)
	MAX	0.08	2.00	0.05	0.03	1.00	12.00	19.00		0.10	0.70

Mechanical Properties

MATERIAL	ASTM A182 F321
T.S (MPA)	515 min
Y.S (MPA)	205 min
EL %	30 min
R/A %	50 min

ASME B16.11 SS Forged Tee VS CS Forged Tee

Compare	ASME B16.11 SS Forged Tee	ASME B16.11 CS Forged Tee
Corrosion Resistance	Excellent, able to withstand corrosive media such as acid, alkali, salt water, etc., with a long service life	Poor, easily corroded and rusted by water and moisture, requiring anti-corrosion treatment
Mechanical Properties	The strength at room temperature is similar to that of carbon steel, and the toughness at high and low temperatures is better	High tensile strength at room temperature (≥ 485MPa), poor toughness at low temperature
Applicable Working Conditions	Scenarios with high requirements for corrosion, high temperature, and cleanliness	Dry, room temperature, non corrosive low-pressure environment
Maintenance Cost	No need for frequent anti-corrosion, long maintenance cycle, low cost	Regular painting and galvanizing are required, with frequent maintenance and high costs
Initial Cost	High raw material prices and initial procurement costs	Low cost of raw materials and initial procurement costs

Will Stainless Steel Forged Tee Rust?

Stainless steel is not "completely rust free" and may rust in the following situations:

Environment with excessive chloride ions: Long term exposure to high concentrations of chloride ions (such as seawater and chlorine containing disinfectants) can damage the passivation film (Cr ₂ O3) on the surface of stainless steel, causing "pitting corrosion" or "stress corrosion cracking";

Oxygen deficient environment: If the soil permeability is poor and moisture accumulates during buried installation, stainless steel cannot continuously form a passive film, which is prone to "crevice corrosion";

Surface pollution: Residual oil and dust during installation, or direct contact with carbon steel fittings (resulting in "galvanic corrosion"), can cause local rusting;

Improper material selection: Using 304 stainless steel to transport highly corrosive media (such as dilute hydrochloric acid) beyond the material's tolerance range can cause comprehensive corrosion.

Treatment Methods After Rusting

Mild rusting (surface floating rust): Use sandpaper (120-200 mesh) to gently polish the rusted area, remove the rust, wipe it clean with alcohol, and then spray stainless steel special rust inhibitor (such as passivation paste) to restore the passivation film;

Moderate corrosion (pitting/crevice corrosion): Apply stainless steel specific acid pickling paste (containing nitric acid and hydrofluoric acid) to the corroded area, let it stand for 5-10 minutes, rinse with clean water, wipe dry, and spray anti rust paint to avoid corrosion diffusion;

Severe corrosion (extensive corrosion/cracking): If the corrosion has penetrated deep into the material or caused structural deformation, the accessories should be replaced immediately to avoid affecting the sealing and safety of the pipeline system. Before replacement, the cause of corrosion (such as medium composition and installation method) should be investigated, and a more suitable material (such as 316 instead of 304) should be selected.

Advantages

High durability

Wide adaptability

safe and stable

Clean and environmentally friendly

Easy installation

Application

ASME B16.11 SS forged tee is widely used in the following industries:

Petrochemical

Natural Gas

Food Processing

Pharmaceutical Manufacturing

Water Treatment

Electricity 

Shipbuilding

Aerospace

Metallurgy

Semiconductor

New Energy