GR.B X42-X70 welded carbon steel pipe 1)Pipes' Size 88.9-609mm 2)Pipes' Wall thickness ... transmission of petroleum and natural gas, building construction, water conveying, steel structure, shipbuilding, farm vehicle, the railway and highway guardrail, container ... ' Packing (1)small sizes packed by steel strips into bundles,big sizes in bulk (2)pipe ends protested by plastic caps or ...