| Standard: | ASTM A312， ASME SA312 | Material Grade: | TP304/304L， 1.4301/1.4307 |
|---|---|---|---|
| NDT: | HT， ET， UT， PMI | Application: | General Industry |
ASTM A312/A312M-21 TP304L SS HOLLOW BAR/ SMLS PIPE WITH THICK WALL
The A312 TP 304L refers to a specific type of pipe that is commonly used in various industries， particularly in the oil and gas， chemical， and petrochemical sectors.
ASTM A312 TP304L has a carbon content of 0.03% or less. This alloy can be used in the as-welded condition without becoming susceptible to intergranular corrosion. ASTM A312 TP304L Stainless Steel are tested in accordance to internationally recognized standards. ASTM A312 Stainless Steel 304L shall be made by a process that does not involved welding at any stage of production. It has excellent features like resistance to corrosion， Prevention of product contamination， Resistance to oxidation， East of fabrication， Excellent formability， Beauty of appearance， Ease of cleaning， High strength with low weight， Good strength and toughness at cryogenic temperatures and Ready availability of a wide range of product forms.
Chemical Composition
| Grade | UNS | C | Mn | P | S | Si | Cr | Ni |
| TP304 | S30400 | 0.08 max | 2.00 max | 0.045 max | 0.03 max | 1.00 max | 18.0-20.0 | 8.0-11.0 |
| TP304L | S30403 | 0.035 max | 2.00 max | 0.045 max | 0.03 max | 1.00 max | 18.0-20.0 | 8.0-13.0 |
Mechanical Properties
| Material | Heat Treatment | Temperure Min.ºF(ºC) | Tensile Strength Ksi (MPa)， Min. | Yield Strength Ksi (MPa)， Min. | Elongation %， Min |
| TP304 | Solution | 1900 (1040) | 75(515) | 30(205) | 35 |
| TP304L | Solution | 1900 (1040) | 70(485) | 25(170) | 35 |
Feature of A312 TP 304L
1. Material: The pipe is made from stainless steel grade 304L， which is a low carbon version of the 304 grade stainless steel. The "L" in the designation stands for low carbon content， which helps to minimize the risk of sensitization and subsequent corrosion.
2. Seamless Construction: The pipe is manufactured using a seamless process， meaning it is formed from a solid billet without any welding or joining. This seamless construction provides the pipe with enhanced strength， reliability， and resistance to pressure and temperature variations.
3. ASTM A312 Standard: The A312 TP 304L is manufactured according to the specifications outlined by (formerly known as American Society for Testing and Materials). ASTM A312 is the standard specification for seamless， welded， and heavily cold worked austenitic stainless steel pipes.
4. Size Range: The A312 TP 304L is available in a wide range of sizes， typically ranging from 1/8" to 24" in nominal diameter. The wall thickness may vary based on the specific requirements of the application.
5. Corrosion Resistance: Stainless steel grade 304L exhibits excellent corrosion resistance properties， making the A312 TP 304L suitable for use in corrosive environments. It offers resistance to various chemicals， acids， and chloride solutions.
6. Applications: The A312 TP 304L is widely used in industries such as oil and gas， chemical processing， food and beverage， pharmaceuticals， pulp and paper， and many others. It is commonly used for transporting fluids， gases， and slurries in high-pressure and high-temperature applications.
7. Heat Treatment: The A312 TP 304L is typically supplied in the annealed condition， which helps to improve its ductility and formability. However， further heat treatment processes like solution annealing or stress relieving may be performed based on specific requirements. It's important to note that proper material selection and adherence to industry standards and codes are crucial for the safe
