In the steel pipe coding content in the API 5L standard, can the length and pipe number be written by hand?

API 5L seamless steel pipe model 138-3277-6262, API 5L seamless steel pipe is pipeline steel seamless steel pipe - API 5L pipeline steel seamless steel pipe, seamless steel pipe pipeline steel material: GR.B, X42, X46, 52, X56, X60, X65, X70. Line pipes transport oil, steam, and water extracted from the ground to oil and natural gas industrial enterprises through pipeline pipes. Line pipes include seamless pipes and welded steel pipes. The pipe ends have a flat end, a threaded end, and a socket end; their connections The methods are welding, coupling connection, socket connection, etc.

　　With the development of API 5L pipeline steel seamless steel pipe technology, molding and technological progress, the application scope of API 5L pipeline steel seamless pipe is gradually expanding. The advantages of our factory’s API 5L large diameter pipeline steel seamless steel pipe are more obvious. API 5L pipeline steel Seamless steel pipes already occupy a major position in the field of pipeline steel pipes. Our factory exports about 100,000 tons of seamless line pipes annually, steel grade GR.B, X42, X46, 52, X56, X60, X65, X70, X80

　　API seamless steel pipe:

　　1) Outer diameter: 11mm-1219.8mm

　　2) Material: API5LGr.B A106Gr.B, A105Gr.B, A53Gr.B, A243WPB, etc.

　　3) Standard: API5L ASTM ASME B36.10. DIN,BS

　　4) Wall thickness: 2.11mm-60mm

　　5) Length: 5.8 meters, 6 meters, 11.6 meters, 11.8 meters, 12 meters fixed length

　　It can also be processed for galvanizing and anti-corrosion of steel pipes.

　　API 5L oil line pipe: API 5L Gr.B, X42, X46, X52, -610mm×2.77-15.09mm; API 5L LSAW automatic submerged arc welding straight seam specifications are: 426-1524mm×4.5-52mm, API 5L SSAW spiral steel pipe specifications are: 219mm -2540mm×5.5-25.4mm. Materials include: Q235, Q345, L245, L290, L320, L360, L390, L415,

　　API 5L oil line pipe: API 5L Gr.B, X42, X46, X52, X56

　　The specifications of seamless steel pipe are: Φ21.3-1016mm×2.11-55mm;

　　The specifications of API 5L ERW high-frequency straight seam steel pipe are: 48.3mm-610mm×2.77-15.09mm;

　　API 5L LSAW automatic submerged arc welding straight seam specifications are: 426-1524mm×4.5-52mm,

　　The specifications of API 5L SSAW spiral steel pipe are: 219mm -2540mm×5.5-25.4mm.

　　Materials include: Q235, Q345, L245, L290, L320, L360, L390, L415.