Basic Info.
Standard
ANSI, DIN, GOST, En1092-1
Ndividual Drawing
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Transport Package
Pallet/Wooden Case
Product Description
Carbon steel forgings, manufactured in accordance with ASTM/ASME A/SA105, are generally used for piping applications. These forged carbon steel piping components (including flanges, fittings, and valves, etc) are used for ambient- and higher-temperature service in pressure systems. The A105N, which is designated with a suffix "N", denotes that the A105 forging shall be furnished in normalized condition. If the forgings are used for piping applications of ASME BPVC or ASME B31, the material shall be its identical equivalent of SA-105 or SA-105N. In short, the heat treatment of normalization distinguishes A105N from A105, or SA-105N from SA-105.
Although normalization is a prevalent heat treatment procedure for ASTM A105 forgings, it is not a mandatory requirement except for the following piping components:
- For ASTM A105 flanges manufactured in accordance with ASME B16.5 or ASME B16.47, if the pressure rating is above Class 300, normalization is a must.
- For A105 flanges of special design where the design pressure at the design temperature exceeds the pressure-temperature ratings of Class 300, Group 1.1, or special design where the design pressure or design temperature are not known, normalization is also required.
- For piping components other than flanges that are made from A105 forgings, if the size is over NPS 4 and the pressure rating is above Class 300, normalization is required. If the working pressure at the operating temperature exceeds the tabulated values for special Class 300 of Group 1.1, ASTM A105N shall be applied.
Q: Can ASTM A105 Forgings Be Used for Tubesheets?
A: ASTM A105/ A105M, identical with ASME SA-105/ SA-105M, is the standard specification for carbon steel forgings for piping applications. The application of ASME SA-105 forgings is endorsed by a series of ASME Boiler and Pressure Vessel Codes and ASME B31 Codes. However, the misuse of this material is commonly seen in some engineering practices. A typical misuse is that some fabricators may manufacture tubesheets from ASTM A105/ ASME SA-105 forgings by mistake.
In the standard specification, it states clearly in para 1.1 that "tubesheets and hollow cylindrical forgings for pressure vessel shells are not included within the scope of this specification". Hence ASTM A105/ ASME SA-105 forgings CAN'T be used for the manufacture of tubesheets. The tubesheet is an important pressure vessel component for heat exchangers, heaters, superheaters and evaporators, etc. For a carbon steel tubesheet, if it is not allowed to be made from A105, what material should it be made from? The answer is ASTM A266 or ASME SA-266 forging as stated in para. 1.3.
Raw Material Specification
CHEMICAL REQUIREMENTS ASTM/ASME A/SA105
Element | Composition, % |
Carbon | 0.35 max |
Manganese | 0.60-1.05 |
Phosphorus | 0.035 max |
Sulfur | 0.040 max |
Silicon | 0.10-0.35 |
Copper | 0.40 max (1) |
Nickel | 0.40 max (1) |
Chromium | 0.30 max (1-2) |
Molybdenum | 0.12 max (1-2) |
Vanadium | 0.08 max |
(1) The sum of copper, nickel, chromium, molybdenum and vanadium shall not exceed 1.00%. (2) The sum of chromium and molybdenum shall not exceed 0.32%. Note: For each reduction of 0.01% below the specified carbon maximum (0.35%), an increase of 0.06% manganese above the specified maximum (1.05%) will be permitted up to a maximum of 1.35%. |
Mechanical Properties of ASTM A105 Materials
Tensile Strength min. | Yield Strength min. | Elongation min. | Reduction of Area, min. | Hardness |
MPa | ksi | MPa | ksi | % | % | HB |
485 | 70 | 250 | 36 | 22 | 30 | 137-187 |
ASTM A350 is the standard specification covering carbon and low-alloy steel forged or ring-rolled flanges, forged fittings and valves intended primarily for low-temperature service and requiring notch toughness testing. They are manufactured to corresponding ASME or API dimensional standards. The forgings may be made from ingots, blooms, billets, slabs or bars through hot-forging process. The steel shall be fully killed and fine-grain. ASTM A350 covers several grades and classes: Grade LF1, Grade LF2, Grade LF3, Grade LF5, Grade LF6, Grade LF9, Grade LF787; and Class 1, Class 2, Class 3.
1. ASTM A350 Chemical Composition Requirements
Element | Composition, w.t % Grades |
LF1 | LF2 | LF3 | LF5 | LF6 | LF9 | LF787 |
C | ≤0.30 | ≤0.30 | ≤0.20 | ≤0.30 | ≤0.22 | ≤0.20 | ≤0.07 |
Mn | 0.60-1.35 | 0.60-1.35 | ≤0.90 | 0.60-1.35 | 1.15-1.50 | 0.40-1.06 | 0.40-0.70 |
P | ≤0.035 | ≤0.035 | ≤0.035 | ≤0.035 | ≤0.025 | ≤0.035 | ≤0.025 |
S | ≤0.040 | ≤0.040 | ≤0.040 | ≤0.040 | ≤0.025 | ≤0.040 | ≤0.025 |
Si | 0.15-0.30 | 0.15-0.30 | 0.20-0.35 | 0.20-0.35 | 0.15-0.30 | ... | ≤0.40 |
Ni | ≤0.40 | ≤0.40 | 3.30-3.70 | 1.00-2.00 | ≤0.40 | 1.60-2.24 | 0.70-1.00 |
Cr | ≤0.30 | ≤0.30 | ≤0.30 | ≤0.30 | ≤0.30 | ≤0.30 | 0.60-0.90 |
Mo | ≤0.12 | ≤0.12 | ≤0.12 | ≤0.12 | ≤0.12 | ≤0.12 | 0.15-0.25 |
Cu | ≤0.40 | ≤0.40 | ≤0.40 | ≤0.40 | ≤0.40 | 0.75-1.25 | 1.00-1.30 |
Cb | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.02 | ≤0.02 | ≥0.02 |
V | ≤0.08 | ≤0.08 | ≤0.03 | ≤0.03 | 0.04-0.11 | ≤0.03 | ≤0.03 |
N | ... | ... | ... | ... | 0.01-0.030 | ... | ... |
*1. When vacuum carbon-deoxidation is required, the silicon content shall be 0.12% maximum.
*2. For grades LF1, LF2 & LF6, the sum of Cu, Ni, Cr, V and Mo shall not exceed 1.00 % on heat analysis.
*3. For all grades except grade LF787, the sum of Cr and Mo shall not exceed 0.32 % on heat analysis.
*4. For grades LF1 & LF2, the limit for Cb may be increased up to 0.05 % on heat analysis and 0.06 % on product analysis.
*5. The carbon equivalent C.E = [C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15] shall not exceed 0.45%.2. ASTM A350 Mechanical PropertiesGrade/Class | Tensile Strength | Yield Strength, min. | Elongation, min. | Hardness, max. |
ksi | MPa | ksi | MPa | % | HBW |
LF1 CL1 | 60-85 | 415-585 | 30 | 205 | 25 | 197 |
LF5 CL1 | 60-85 | 415-585 | 30 | 205 | 25 | 197 |
LF2 CL1 | 70-95 | 485-655 | 36 | 250 | 22 | 197 |
LF2 CL2 | 70-95 | 485-655 | 36 | 250 | 22 | 197 |
LF3 CL1 | 70-95 | 485-655 | 37.5 | 260 | 22 | 197 |
LF3 CL2 | 70-95 | 485-655 | 37.5 | 260 | 22 | 197 |
LF5 CL2 | 70-95 | 485-655 | 37.5 | 260 | 22 | 197 |
LF6 CL1 | 66-91 | 455-630 | 52 | 360 | 22 | 197 |
LF6 CL2 | 75-100 | 515-690 | 60 | 415 | 20 | 197 |
LF6 CL3 | 75-100 | 515-690 | 60 | 415 | 20 | 197 |
LF9 | 63-88 | 435-605 | 46 | 315 | 25 | 197 |
LF787 CL2 | 65-85 | 450-585 | 55 | 380 | 20 | 197 |
LF787 CL3 | 75-95 | 515-655 | 65 | 450 | 20 | 197 |
*1. The elongation values are on the basis of standard round specimen, or small proportional specimen, min % in 4D gauge length.
*2. The yield strength shall be determined by either the 0.2 % offset method or the 0.5 % extension under load method.
Shipped Flange Photos
Production Range
DN15-DN3000
Maximum weight 6tons
25,000tons production annual year
Manufacturing Standard
ANSI B16.5,ANSI B16.47 Series A&B,ANSI B16.48,ANSI B16.36
API 605,API 16D,API 17D
BS4504,BS3293
DIN
AS
EN1092-1
GOST
EEMUA145
Inspection Certificate
EN10204-3.1
EN10204-3.2 byTUV,BV,Lloyds,GL,DNV,SGS,ABS,RINA,Moody or other third parties
Address:
Building 9, No. 1558, Kangqiao Rd., Pudong, Shanghai, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Chemicals, Construction & Decoration, Industrial Equipment & Components, Manufacturing & Processing Machinery, Metallurgy, Mineral & Energy, Tools & Hardware
Management System Certification:
ISO 9001, ISO 14001, ASME
Company Introduction:
Dingxiang CHN Flange Forging Co., Ltd. is located in the State Dingxiang named"hometown of forging", founded in 2006 invested by TianYuan(HK) International Limited be specialized in manufacturing various kinds of high quality flange and other forging.
Being a designer and manufacturer of flange and forgings in the industry. We provide both standard and customized designs in a large range of different pipeline system. Our main products include Welding Neck, Slip-on, SocketWelding, Threaded, Binld according to ANSI, DIN, JIS, EN, made of ASTM A105, A350, A694, A182, ect. Our engineers are able to design the right products to fit your application and the best solution for your requirements. The products have been wildely used in the industries of petroleum, chemical, foodstuff, metallurgy, construction, electric power and so on.
We have a 4, 000tons Hydraulic Machine and 6300 Ring Rolling Machine operating flange&ring production, the maximum outside diameter is up to 6000mm, maximum gross weight up to 6tons. Our annual production capacity of Flange is 25000tons;
We do a whole set of chemical and mechanical performance test, metallurgical structure, hardness test, NDE test, salt-fog test, film thickness test, roughness test, and the lowest temperature of impact test can be -196 degree C.
We treat Quality, Customer, Market, Upgrade as the most important.