PTFE XYLAN 1070 COATED ASTM A320 GRADE L7 STUD BOLT
China manufacturer of PTFE Xylan 1070 Coated ASTM A320 grade L7 Stud bolt in China.
Xylan 1070 coated ASTM A320 grade L7 stud bolt is a premium Stud bot grade for using in low-temperature service.With Xylan 1070 coating, this stud bolt ensures durability and reliability in critical applications
PTFE Xylan 1070 can be produced in several colours (i.g. blue, yellow, red ) and has a high corrosion resistance. It can be used at temperatures up to 260° C and to achieve a good end result, (the correct) pre-treatment is essential. With the exception of stainless steel, the material first has to be treated with a primer (anti-corrosion), followed by the PTFE layer. The materials for applying PTFE are heated in ovens where the top layers fuse together. This method meets the requirements set by, among others, the offshore and (petro)chemical industry.
ASTM A320.L7. Stud Bolt is a high-strength, low-temperature fastener widely used in cryogenic and cold-weather environments.
ASTM A320 grade L7 is a Chromium-molybdenum alloy steel.normally AISI 4140,with Quenched and tempered to achieve the required strength and hardness.Designed for use in temperatures as low as -150°F (-101°C) .
ASTM A320 Grade L7 Chemical Composition
Typical chemical compositions include carbon, manganese, silicon, phosphorus, sulfur, chromium, molybdenum and other elements. The addition of alloying elements such as chromium and molybdenum helps to improve the strength, hardness and corrosion resistance of bolts.
Chemical Requirement of ASTM A320 grade L7 Stud bolt
| Grade | C | Mn | P Max | S Max | Si | Mo | Cr |
| A193 L7M | 0.38-0.48 | 0.75-1.00 | 0.035 | 0.04 | 0.15-0.35 | 0.15-0.25 | 0.80-1.10 |
PTFE Xylan 1070 Coated ASTM A320 grade L7 Stud bolt Specifications
| Property | Details |
|---|---|
| Material Grade | ASTM A320 Grade L7 |
| Size Range | 1/4″ to 4″ (M6 to M100 metric) |
| Length Range | Standard and custom lengths |
| Finish Options | Plain, galvanized, PTFE-coated, Xylan-coated |
| Operating Temperature | As low as -150°F (-101°C) |
| Thread Type | UNC (coarse) or Metric Thread |
Application of ASTM A320 Grade L7 stud bolt
- Cryogenic Systems: Used in low-temperature pipelines and storage tanks.
- Oil and Gas Industry: Offshore and onshore installations exposed to extreme conditions.
- Petrochemical Plants: High-pressure and low-temperature systems.
- Power Plants: Boilers, turbines, and other critical equipment.
- Marine Environments: With protective coatings for corrosion resistance.
What is the difference between ASTM A320 grade L7 and ASTM A193 B7 and Stud bolt
- ASTM A193 B7: Used for applications that require strength and resistance to creep in high-temperature environments.
- ASTM A320 Grade L7: Includes low-temperature impact testing to ensure performance in cryogenic conditions.
| Aspect | ASTM A193 B7 | ASTM A320 Grade L7 |
|---|---|---|
| Primary Use | High-temperature applications | Low-temperature (cryogenic) applications |
| Operating Temperature | -20°F to 1,200°F (-29°C to 650°C) | -150°F to 850°F (-101°C to 454°C) |
| Heat Treatment | Quenched and tempered | Quenched, tempered, and low-temp optimized |
| Impact Testing | Not required | Required for low-temperature toughness |
| Common Coatings | Plain, galvanized, Xylan-coated | Plain, galvanized, Xylan-coated |
How to choose the right Stud Bolt between ASTM A193 B7 and ASTM A320 grade L7 Stud bolt
- Select ASTM A193 B7: For high-temperature systems like boilers, pressure vessels, and refinery equipment.
- Select ASTM A320 Grade L7: For cryogenic or low-temperature pipelines, storage tanks, and processing facilities.
Order specification for PTFE Xylan 1070 coated ASTM A320 grade L7 Stud bolt
STUD BOLTS, ALLOY STEEL, COATING WITH XYLAN 1070
MAT. IN ACC. WITH ASTM A-320 GRADE L7 STUD BOLT and NUTS IN ACC. WITH ASTM A-194 GRADE 4 WASHER FACED
THREAD UNC IN ACC. WITH IBS 1580
TO BE MARKED AS REQUIRED BY STANDARD AND SUPPLIED WITH TWO NUTS
Quantity: 306 pcs
