ASTM A694 F65 Flange Order From Malaysia

On February 18, 2025, a new customer from Malaysia sent us an inquiry for ASTM A694 F65 flanges, including weld neck flanges and blind flanges, all of which are our company’s main products. After completing the quotation, the customer placed an order with us a week later.

ZIZI is a company specializing in the production and processing of pipes and fittings. The pipes and pipe fittings we produce are mainly used in chemical, petroleum, natural gas, water conservancy, electric power, marine engineering and other fields. The products mainly include seamless pipes, welded pipes, butt-weld pipe fittings, high-pressure forged pipe fittings and flanges of various sizes. The materials include carbon steel, stainless steel, alloy steel, low-temperature steel, duplex steel, base alloy, etc.

 

1	FLANGE WN RF ASTM A694 F65 900LBS ANSI B16.5 4” WT=XXS (O.D.114.3mm x W.T.17.12mm)
2	FLANGE WN RF ASTM A694 F65 900LBS ANSI B16.5 6” WT=XXS (O.D.168.3mm x W.T.22mm)
3	FLANGE BLIND RF ASTM A694 F65 900LBS, ASTM B16.5 6”
4	FLANGE WN RF ASTM A694 F65 900LBS ANSI B16.5 2” WT=XXS (O.D.60.3mm x W.T.11.1mm)
5	FLANGE BLIND RF ASTM A694 F65 900LBS, ASTM B16.5 2”
6	FLANGE BLIND RF ASTM A694 F65 900LBS, ASTM B16.5 4”

 

Inspection Checklist for ASTM A694 F65 Flanges

 

Visual Inspection

Surface finish: Check for cracks, rust, pitting, or surface defects.

Dimensions: Ensure compliance with applicable flange standards (e.g., ASME B16.5, B16.47).

Markings: Confirm proper marking — material grade (F65), heat number, rating class, size, standard, manufacturer’s logo.

Dimensional Inspection

Use calipers, micrometers, and templates to verify:

Outside diameter (OD)

Bolt circle diameter (BCD)

Thickness

Raised face or ring-type joint (RTJ) details

Bore size

Drilling pattern for bolt holes

 

 

ASTM A694 F65 Flange Specification

 

Shape Type	Regular and Long Neck
Sealing Face	RF, FF, FTJ
Size Range	1/2″ – 48″/ DN15 – DN1200
Pressure Rating	Class 150, 300, 600, 900, 1500, 2500lb
Standard	ASME B16.5, ASME B16.47 Series A/B
Pipeline Steel	ASTM A694 F42 / 46 / 56 / 60 / 65

 

The ASTM A694 F65 flange is a type of forged carbon steel or alloy steel flange specifically designed for high-pressure transmission service. Here’s a breakdown of what that means:

ASTM A694: This is a standard specification published by ASTM International that covers carbon and alloy steel forgings used for various piping components like flanges, fittings, valves, and other parts intended for high-pressure service.

F65: This designation indicates a specific grade within the ASTM A694 standard. The “F” signifies a forging, and “65” refers to the minimum specified yield strength of the material in ksi (kilopounds per square inch).

 

ASTM A694 F65 Flanges Chemical Composition 

 

	C	Si	Mn	S	P	Cr	Mo	Cu	Al	Ti	V
Min	0.1	0.15	1.25				0.15		0.015		0.05
Max	0.14	0.25	1.4	0.003	0.025	0.15	0.2	0.2	0.025	0.05	0.07

 

ASTM A694 F65 Flanges Mechanical Properties

 

Tensile Strength	Yield Strength	Elongation	Reduction of	Charpy J	Hardness
Min, Ksi [Mpa]	min, ksi [MPa]	%	areamin, %	-46c	HB
>77 [530]	>65 [450]	>20	>45	0.45	152-235

 

Class 900 lb Weld Neck Flange Dimension

 

 

Nominal Pipe Size		A	B	C	D	E	F	G	H	I	J	Weight
	mm								Holes	mm		kg/ piece
1/2	21.30	120.6	specified by 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

Class 900 lb Blind Flange Dimension

 

 

Nominal Pipe Size		A	C	G	H	I	J	Weight
	Outside Diameter	Overall Diameter	Flange Thickness min	Face Diameter	Number of Holes	Bolt Hole Diameter	Diameter of Circle of Holes	kg/piece
	mm					mm
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

 

Key Characteristics of ASTM A694 F65 Flanges

 

High Yield Strength

The minimum yield strength is 65 ksi (450 MPa), making it suitable for high-pressure applications.

Good Tensile Strength

The minimum tensile strength is typically around 77 ksi (530 MPa).

Weldability

Generally considered weldable, but specific welding procedur es might be required.

Low-Temperature Toughness

Often selected for its good toughness even at low temperatures.

Material Composition

It’s a low alloy steel with specific chemical composition designed for strength and durability. Typical elements include carbon, manganese, silicon, phosphorus, and sulfur, with potential additions of other alloying elements like chromium, molybdenum, nickel, etc.