ASTM A694 F65 Flanges Order

On February 5th, 2025, we received an inquiry from an overseas long-term customer regarding the ASTM A694 F65 flanges. Our business promptly responded based on years of experience. The customer placed the order ten days later, and we immediately arranged production to ensure that the product could be delivered to the customer as soon as possible.

Purchase List：

ITEM	DESCRIPTION	Quantity	Unit
1	FLANGE WN RF ASTM A694 F65 900LBS, ANSI B16.5 4”	2	EA
2	FLANGE WN RF ASTM A694 F65 900LBS, ANSI B16.5 6”	2	EA
3	FLANGE BLIND RF ASTM A694 F65 900LBS, ASTM B16.5 6”	2	EA
4	FLANGE WN RF ASTM A694 F65 900LBS, ANSI B16.5 2”	2	EA
5	FLANGE BLIND RF ASTM A694 F65 900LBS, ASTM B16.5 2”	2	EA
6	FLANGE BLIND RF ASTM A694 F65 900LBS, ASTM B16.5 4”	2	EA

Inspection of Weld Neck Flanges：

1. Measure dimensions: Check the thickness, outer diameter, and center distance of the bolt holes.
2. Examine the sealing surface: It should be smooth without any scratches or radial marks.
3. Inspect the groove: Check whether the groove angle and the fillet edge meet the requirements.
4. Regarding materials: Verify that the material markings and pressure ratings are correct.
5. Examine the weld area: The transition zone where the cylinder is joined should be smooth.

Inspection of Blind Flanges：

1. Measurement of thickness: Use the caliper to measure several points and ensure that the thickness meets the requirements.
2. Inspect the sealing surface: Feel it with your hand. It should be smooth and flat without any radial scratches or dents.
3. For the bolt holes: Verify the number of holes and the diameter of the center circle of the bolt holes to ensure they are properly aligned.
4. Observe the appearance: Check for any cracks, burrs or excess coatings on the edges and inner holes.
5. Verification of markings: Ensure that the pressure rating and material indicated on the steel stamp are correct.

ASTM A694 F65 Flanges Material：

Chemical composition:

A chemical heat analysis in accordance with Specifca-tion A961/A961M shall be made and conform to the require-ments as to chemical composition prescribed in Table 2.

Table 2
Element	Composition, %
Carbon, max	0.3
Manganese, max	1.6
Phosphorus, max	0.025
Sulfur, max	0.025
Silicon	0.15-0.35
Copper	–
Nickel	–
Chromium	–
Molybdenum	–
Vanadium	–
Columbium (Niobium)	–
Boron	–

Mechanical properties:

ASTM A694 F65 is a high-strength carbon steel forging used in high-pressure pipeline systems. Its mechanical properties feature a high yield strength (≥ 450 MPa), tensile strength (≥ 530 MPa), and excellent impact toughness, enabling it to maintain stable mechanical performance in low-temperature and high-pressure environments.

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %
ASTM A694 F65	530min	450min	20 min

ASME B16.5 Class 900 Weld Neck Flanges Dimension:

The pressure ratings of the ASME B16.5 weld neck flanges include seven levels: 150#, 300#, 400#, 600#, 900#, 1500#, and 2500#.

Class 900 Weld Neck Flanges Dimension:

Nominal Pipe Size		A	B	C	D	E	F	G	H	I	J	Weight
inch	mm	mm	mm	mm	mm	mm	mm	mm	Holes	mm	mm	kg / piece
1/2	21.30	120.6	To be specified by the Purchaser	22.30	60.45	21.30	38.10	35.00	4	22.30	82.50	1.87
3/4	26.70	130.0		25.40	69.85	26.70	44.00	42.90	4	22.30	88.90	2.56
1	33.40	149.3		28.40	73.15	33.50	52.30	50.80	4	25.40	101.6	3.74
11/4	42.20	158.7		28.40	73.15	42.20	63.50	63.50	4	25.40	111.2	4.33
11/2	48.30	177.8		31.70	82.50	48.30	69.85	73.15	4	28.40	123.9	5.94
2	60.30	215.9		38.10	101.6	60.45	104.6	91.90	8	25.40	165.1	10.8
21/2	73.00	244.3		41.10	104.6	73.15	123.9	104.6	8	28.40	190.5	15.0
3	88.90	241.3		38.10	101.6	88.90	127.0	127.0	8	25.40	190.5	13.7
4	114.3	292.1		44.40	114.3	114.3	158.7	157.2	8	31.70	234.9	22.5
5	141.3	349.2		50.80	127.0	141.2	190.5	185.7	8	35.00	279.4	37.4
6	168.3	381.0		55.60	139.7	168.4	234.9	215.9	12	31.70	317.5	47.7
8	219. 1	469.9		63.50	162.0	219.2	298.4	269.7	12	38.10	393.7	81.3
10	273.0	546.1		69.85	184. 1	273.0	368.3	323.8	16	38.10	469.9	119
12	323.8	609.6		79.25	200. 1	323.8	419.1	381.0	20	38.10	533.4	157
14	355.6	641.3		85.80	212.8	355.6	450.8	412.7	20	41.10	558.8	180
16	406.4	704.8		88.90	215.9	406.4	508.0	469.9	20	44.40	615.9	217
18	457.2	787.4		101.6	228.6	457.2	565.1	533.4	20	50.80	685.8	292
20	508.0	857.2		107.9	247.6	508.0	622.3	584.2	20	53.80	749.3	362
24	609.6	1041.4		139.7	292. 1	609.6	749.3	692.1	20	66.55	901.7	665

ASME B16.5 Class 900 Blind Flanges Dimension:

The pressure ratings of the ASME B16.5 blind flanges include seven levels: 150#, 300#, 400#, 600#, 900#, 1500#, and 2500#.

Class 900 Blind Flanges Dimension:

Nominal Pipe Size		A	C	G	H	I	J	Weight
inch	mm	mm	mm	mm	Holes	mm	mm	kg / piece
1/2	21.3	120.6	22.3	35. 10	4	22.3	82.5	1.77
3/4	26.7	130	25.4	42.9	4	22.3	88.9	2.42
1	33.4	149.3	28.4	50.8	4	25.4	101.6	3.57
11/4	42.2	158.7	28.4	63.5	4	25.4	111.2	4.15
11/2	48.3	177.8	31.7	73. 15	4	28.4	123.9	5.75
2	60.3	215.9	38. 10	91.9	8	25.4	165.1	10.1
21/2	73	244.3	41. 10	104.6	8	28.4	190.5	14.0
3	88.9	241.3	38. 10	127	8	25.4	190.5	13.1
4	114.3	292.1	44.5	157.2	8	31.7	234.9	26.9
5	141.3	349.2	50.8	185.7	8	35	279.4	36.5
6	168.3	381	55.6	215.9	12	31.7	317	47.40
8	219.1	469.9	63.5	269.7	12	38.1	393.7	82.5
10	273	546.1	69.85	323.9	16	38.1	469.9	122
12	323.8	609.6	79.25	381	20	38.1	533.4	173
14	355.6	641.3	85.8	412.8	20	41.1	558.8	206
16	406.4	704.8	88.9	469.9	20	44.4	615.9	259
18	457.2	787.4	101.6	533.4	20	50.8	685.8	367
20	508	857.2	107.9	584.2	20	53.8	749.3	463
24	609.6	1041.4	139.7	692.2	20	66.55	901.7	876

Application of ASTM A694 F65 Weld Neck Flanges:

• Petroleum and natural gas transmission pipelines
• Ocean Engineering and Offshore Platforms
• High-pressure chemical pipeline system
• High-voltage equipment in the energy and power industry

Application of ASTM A694 F65 Blind Flanges:

• High-pressure chemical and petrochemical facilities
• Equipment in the energy and power industry
• Ocean Engineering and Offshore Platforms
• Petroleum and natural gas transmission pipelines

Conclusion：

This successful shipment of ASTM A694 F65 flanges demonstrates our commitment to delivering high-quality piping components for the global energy industry. The combination of advanced material properties, precision engineering, and rigorous quality control ensures that our ASTM A694 F65 weld neck and blind flanges meet the most demanding operational requirements in extreme service conditions.