Vi bruker for øvrig rundpinnen til vrangborden.

For øvrig usually means by the way, incidentally, or as an extra note.

In this sentence, it adds something like:

• By the way, we use the circular needle for the ribbing.
• Incidentally, we use the circular needle for the ribbing.

Depending on context, it can also feel close to also or for that matter, but by the way is often the most natural first understanding.

In Norwegian, adverbial phrases like for øvrig often come after the verb in a main clause.

So:

• Vi bruker for øvrig rundpinnen ...

is a very natural word order.

Norwegian main clauses normally follow the pattern:

• subject + verb + sentence adverb / other elements

Putting for øvrig somewhere else may be possible in some contexts, but this version is the most straightforward and idiomatic here.

Rundpinnen is the definite singular form of rundpinne, which means circular needle in knitting.

Breakdown:

• rund = round / circular
• pinne = needle

So:

• en rundpinne = a circular needle
• rundpinnen = the circular needle

Because Norwegian often uses the definite form where English might say the.

The ending -en is the definite article attached to the noun:

• en rundpinne = a circular needle
• rundpinnen = the circular needle

So instead of using a separate word like English the, Norwegian usually adds the definiteness to the end of the noun.

Here, til means something like for.

So:

• bruke noe til noe = use something for something

In this sentence:

• Vi bruker rundpinnen til vrangborden
• We use the circular needle for the ribbing

This is a very common pattern in Norwegian:

• bruke X til Y = use X for Y

Yes, it is very common.

Examples:

• Jeg bruker en kniv til brødet. = I use a knife for the bread.
• Hun bruker mobilen til jobb. = She uses the phone for work.
• Vi bruker rundpinnen til vrangborden. = We use the circular needle for the ribbing.

So if you want to say what something is used for, til is often the natural choice.

Vrangborden is the definite singular form of vrangbord, a knitting term usually translated as ribbing.

So:

• en vrangbord = a ribbed section / ribbing
• vrangborden = the ribbing

In knitting language, this refers to the stretchy ribbed part, often at the cuff, hem, or neckline.

Because vrangbord is treated as a noun with the definite singular ending -en.

So:

• en vrangbord = a ribbing section
• vrangborden = the ribbing

This is the same pattern as many other Norwegian nouns:

• en bil → bilen
• en stol → stolen
• en vrangbord → vrangborden

Because the sentence is referring to specific things already understood in the context.

In knitting instructions, that is very common. The speaker assumes you know:

• which circular needle is being discussed
• which ribbing section is meant

So Norwegian naturally uses the definite forms:

• rundpinnen = the circular needle
• vrangborden = the ribbing

It literally means we, but in instructions Norwegian often uses vi in a friendly, inclusive way.

So it can mean:

• we = the instructor and the reader together
• something close to English instructional we

For example, in patterns and tutorials, vi often feels like:

• now we use...
• here we do...

So it may not be emphasizing a specific group; it can simply be guiding the reader through the steps.

Yes, sometimes, but the nuance and emphasis can change.

For example:

• Vi bruker for øvrig rundpinnen til vrangborden.
  Very natural: We use the circular needle for the ribbing, by the way.

You might also see:

• For øvrig bruker vi rundpinnen til vrangborden.

That puts more emphasis on for øvrig at the beginning, like:

• By the way, we use the circular needle for the ribbing.

Both are possible, but the original sentence is perfectly natural.

Yes. It sounds very much like instructional or pattern language.

Typical features are:

• vi used in an instructional way
• technical knitting vocabulary like rundpinne and vrangbord
• practical wording with bruke ... til ...

So this sentence sounds like something from a knitting pattern, tutorial, or explanation of materials and technique.