For API 5L steel pipe, no matter seamless steel pipe or welded type, we primesteeltube can provide PSL 1and PSL 2 for you. Different types would have special applications. And of course, the thickness tolerance is also disparate from each other.
Here is the chart for the difference of tolerance under the influence of various wall thickness for seamless and welded pipe. Of course, we should notice one point for this: if the purchase order has difference over specific minus tolerance, we shall connect with manufacturer for details.