1.standard sizes:
OD: 30-250mm
wall thickness: 3-35mm
length: 3-5.8m
tolerance: H8
straighness: 0.5mm/1000mm
steel grade: 20-45#, 16Mn, Q345, St52, St 37, etc.
standard: DIN, GB, ASTM, API,etc.
non-standard sizes:
as cuetomer's request.
2.surface treatment:
oil painting, galvanized, chromed, or as customer's requirments.
3.package:
packed in bundle, with plastic caps, plastic bag, etc
4.delivery time:
within 30 days generally
5.payment term:
T/T, L/C( we prefer T/T)
