seamless steel pipe Parameters and knowledge of delivery and
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Parameters and knowledge of delivery and acceptance of seamless steel pipe
Outside diameter and wall thickness of seamless steel pipe
1.1 seamless steel pipe nominal outside diameter of 88.9mm, the nominal wall thickness of 6.45mm.
1.2 seamless steel pipe diameter and wall thickness is promised to the delineation of the bias should be in accordance with Table 1. Table outside diameter promised deviation of + 0.50mm-0.20mm wall thickness promised deviation of + 0.97mm-0.77mm
The length of seamless steel pipe
The usual length of seamless steel pipe 9400mm ~ 9750mm. The buyer and the seller negotiated and specified in the contract, and can also supply the other lengths seamless steel pipe.
The shape of seamless steel pipe
3.1 seamless steel pipe curvature shall not be greater than 1.0mm / m.
3.2 seamless steel pipe end should be at both ends with seamless steel tube axis vertical incision burr must be removed.
Weight of seamless steel pipe
Seamless steel pipe of the actual weight of the delivery, the delivery also theoretical weight.
Seamless steel pipe per meter theoretical weight of 13.115kg / m (the steel density 7.85kg/dm3).
The finished chemical composition of seamless steel pipe
Refined chemical composition of seamless steel pipe probably deviation should be related to the establishment in accordance with GB / T 222.
Delivery status of seamless steel pipe seamless steel pipe rolled Delivery.
Seamless steel pipe mechanical function after appropriate heat treatment, the mechanical function of the seamless steel pipe API SPEC 5CT N80 steel grade requirements should reach.
Compactness of seamless steel pipe seamless steel pipe should be out by the root of eddy current testing to overhaul the compactness of the seamless steel pipe, eddy current testing comparison sample artificial defects through-hole diameter φ2.2mm ± 0.01mm.
Seamless steel pipe surface quality seamless steel pipe surface quality is performed according to API SPEC 5CT N80 tubing surface quality requirements.
Seamless steel pipe repair and test acceptance rules delineated according to GB / T 2102.
Seamless steel pipe furnace inspection and acceptance.
Packaging, marking and quality confirmed book packaging of seamless steel pipe, marking, quality confirmed shall be in accordance with GB / T 2102 delineated.
Each bundle no more than 2 tons of seamless steel pipe weight, seamless steel surfaces should be coated with creosote.
The buyer and the seller negotiated and specified in the contract, or agreement delineated flag.
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