Pipe Ka Weight Kaise Nikale — Formula aur Calculator (Hindi/English)

Pipe ka weight nikalne ke liye aapko sirf do measurements chahiye: pipe ka outside diameter (OD) millimetres mein, aur wall thickness (WT) millimetres mein. Inhe formula mein daalein — Weight (kg/m) = (OD − WT) × WT × 0.02466 — aur result kg per metre mein milega. IS:1239 standard ke anusaar yahi method India mein officially use hota hai. Neeche complete step-by-step explanation, formula breakdown, aur IS:1239 weight chart diya gaya hai.

Formula Kya Hai — Har Variable Ki Definition

Formula dikhne mein simple hai, lekin har variable ka specific physical meaning hai. Ek baar yeh samajh lena ke baad kisi bhi pipe ka weight calculate karna 30 seconds ka kaam hai.

Formula: Weight (kg/m) = (OD − WT) × WT × 0.02466

OD

Outside diameter — pipe ka bahari diameter, millimetres mein. IS:1239 mein yeh NB size ke hisaab se fixed hota hai (e.g., 50 NB pipe ka OD = 60.3 mm).

WT

Wall thickness — pipe ki deewar ki motaai, millimetres mein. IS:1239 mein Light, Medium aur Heavy class ke liye alag-alag WT defined hai.

0.02466

Steel ka constant — formula π × ρ / 4000 se aata hai, jahan ρ = 7850 kg/m³ (steel ki density). Yeh value IS:1239 aur IS:1852 dono mein accepted hai.

Weight (kg/m)

Result — pipe ka weight per metre of length, kilograms mein.

Yeh formula bilkul wahi hai jo Tata Steel, APL Apollo, aur Jindal jaisi companies apne product catalogues mein use karti hain. Agar aapko total weight chahiye, to result ko length (metres mein) se multiply karein.

IS:1239 MS Pipe Weight Chart — Light, Medium aur Heavy Class

IS:1239 (Part 1):2004 teen classes define karta hai. Light class mein wall thickness sabse kam hoti hai (aur isliye weight bhi kam), Heavy class mein sabse zyada. Neeche ka table directly BIS standard se liya gaya hai — yahi data fabrication quotes aur purchase orders mein use hota hai.

Wall thickness aur weight IS:1239 (Part 1):2004 ke anusaar hain. Weight tolerance: ±7.5% per piece, ±5% per consignment, as per IS:1852. Actual supplier weight slightly vary ho sakta hai.

Agar aapko apni specific pipe size ka weight jaldi calculate karna hai, to hamare free Metal Weight Calculator ka use karein — sirf OD aur WT daalo, instant result milega.

Worked Example — 50 NB Medium Class Pipe, 6 Metre Length

Maan lijiye aapko ek mezzanine structure ke liye 50 NB Medium Class MS pipe chahiye, aur aapko 20 pieces × 6 metre ka total weight purchase order ke liye calculate karna hai. Yahaan step-by-step calculation hai:

Step 1 — Values identify karein:
NB Size = 50 | OD = 60.3 mm | Medium Class WT = 3.6 mm

Step 2 — Formula apply karein (weight per metre):
Weight = (60.3 − 3.6) × 3.6 × 0.02466
Weight = 56.7 × 3.6 × 0.02466
Weight = 204.12 × 0.02466
Weight = 5.03 kg/m

Step 3 — Ek piece ka total weight (6 m):
5.03 × 6 = 30.18 kg per piece

Step 4 — 20 pieces ka total weight:
30.18 × 20 = 603.6 kg

Yani 20 pieces × 6 m = 120 running metres of 50 NB Medium Class MS pipe ka total weight approximately 604 kg hoga. Agar aap APL Apollo ya Tata Steel ka pipe use kar rahe hain, to unke catalogues mein bhi 5.03 kg/m ka same value milega — kyunki sab IS:1239 follow karte hain.

Aur bhi precise calculation ke liye — khaas taur par agar aap different lengths, multiple sections, ya round bars ka weight nikalna chahte hain — hamare Metal Weight Calculator mein sabhi IS sections pre-loaded hain.

Pipe Weight Nikalne Ke Common Mistakes Aur Unse Kaise Bachein

Shop floor par yeh galtiyan sabse zyada hoti hain:

1 — OD ki jagah NB size use karna: 50 NB ka matlab yeh nahi ki OD bhi 50 mm hai. 50 NB pipe ka actual OD 60.3 mm hota hai. Formula mein hamesha actual OD daalna hai, NB nahi.

2 — Light aur Medium class mix-up: Ek hi NB size ke liye Light class ka weight Medium se kaafi alag hota hai. 50 NB mein yeh difference 4.11 kg/m vs 5.03 kg/m hai — yaani 22% zyada. Purchase order mein class specify zaroor karein.

3 — Galat constant use karna: Kuch log 0.0246 ya 0.0248 use karte hain. Correct value 0.02466 hai — yahi IS:1852 accepted hai. Gol karna mat karein.

In teen baaton ka dhyan rakhein to MS pipe ka weight kaise nikale ka sawaal hamesha ke liye solve ho jaayega. Isse bhi gehra dive lena ho to hamara How to Calculate Pipe Weight — Step-by-Step Guide zaroor padhein.