Advantages:
1.Higher Working Pressure Capbility: Under same working pressure, the stress to the sprial welding seam is 75%-90% of striaght seam, so the sprial pipe can bear higher working pressure. Therefore, the wall thickness of sprial pipes can be 10%-25% less than stright seam pipes under same working pressure, saving costs for the material;
2. Good Precision: the tolerance of diameter is usually with in 0.12%, the deflection is less than 1/2000, and ovality is less than 1%, so the sizing and strenghtening works can be saved;
3. High Utilization: the sprial pipes can be continually produced, with less loss of cutting head and end, which can rise the utilization of 6%-8%;
4. Full Range of Sizes: the sprial pipes are ranging from small diameter to large diameter, easier operation than straight seam pipe;
5. Mechanization and Automation
What we can do with SSAW welding steel pipe?
Spiral seam double surface submerged arc steel pipes are used widely in many field,such as fluid,petroleum and natrual gas transportation.Also there are some STANDARDS of PRODUCTS.
• API Spec 5L Line pipeand steel pipe standard;
• BG/T 9711.1-1997 Delivery of petroleum and natrual gasindustrial transportation steel pipe Technical conditions Part 1 Grade-A Steel Pipe;
• GB/T 9711.2-1999 Delivery of petroleum and natrual gasindustrial transportation steel pipe Technical conditions Part 1 Grade-B Steel Pipe;
• SY/T5037-2000 Spiral submerged are welding steel pipe forlow-pressure fluid deliverypipe.
