diff --git a/backend/src/modules/lpg/lpg.controller.ts b/backend/src/modules/lpg/lpg.controller.ts
index ee3f00e..7407fd6 100644
--- a/backend/src/modules/lpg/lpg.controller.ts
+++ b/backend/src/modules/lpg/lpg.controller.ts
@@ -45,7 +45,7 @@ export class LPGController{
     
             catch (error) {
                 res.status(500).json({
-                    message:"Error al obtener requisicion",
+                    message:"Error al obtener requisición",
                     error
                 });
             }
@@ -105,33 +105,71 @@ export class LPGController{
             }
         }
     
-        //Eliminar requisición
+    async getByStatus(
+        req:Request,
+        res:Response,
+    ){
+
+        try{
+            const request = await service.getByStatus(
+                req.params.status as string
+            );
+
+            res.json(request);
+        }catch(error){
+            res.status(500).json({
+                message:"Error al obtener requisición "
+            });
+        }
+    }
+
+
+    async getByPlant(
+        req:Request,
+        res:Response,
+    ){
+
+        try{
+            const request = await service.getByPlant(
+                req.params.plant as string
+            );
+
+            res.json(request);
+        }catch(error){
+            res.status(500).json({
+                message:"Error al obtener requisición "
+            })
+        }
+    }
+
+    //Eliminar requisición
     
-        async delete(
-            req:Request,
-            res:Response
-        ){
-            try{
-                const request = 
-                await service.delete(
-                    req.params.id as string
-                );
-    
-                if(!request){
-                    return res.status(404).json({
-                        message:
-                        "Requisición no encontrada"
-                    });
-                }
-                res.json({
+    async delete(
+        req:Request,
+        res:Response
+    ){
+        try{
+            const request = 
+            await service.delete(
+                req.params.id as string
+            );
+            
+            if(!request){
+                return res.status(404).json({
+                    message:"Requisición no encontrada"
+                });
+            }
+                
+            
+            res.json({
                     message:"Requisición eliminada correctamente"
                 });
-            }
-            catch (error) {
-                res.status(500).json({
-                    message: "Error al eliminar requisición",
-                    error
-                });
-            }
+
+        }catch(error) {
+            res.status(500).json({
+                message: "Error al eliminar requisición",
+                error
+           });
         }
+    }
 }
\ No newline at end of file
diff --git a/backend/src/modules/lpg/lpg.interface.ts b/backend/src/modules/lpg/lpg.interface.ts
index 94d5849..574d80a 100644
--- a/backend/src/modules/lpg/lpg.interface.ts
+++ b/backend/src/modules/lpg/lpg.interface.ts
@@ -1,16 +1,29 @@
-import { ObjectId } from "mongoose";
+import { Types } from "mongoose";
 
 export interface ILpg{
 
     requestNumber:string;
+
     plant:string,
+
     equipment:string;
-    requestedBy:ObjectId;
-    approvedBy?:ObjectId;
+
+    requestedBy:Types.ObjectId;
+
+    approvedBy?:Types.ObjectId;
+
     requestDate:Date;
-    gallons:number;
+
+    gallonQuantity:number;
+    
     pricePerGallon:number;
+
     totalAmount:number,
+
     comments?:string;
-    status:string;
+
+    status:
+        | "PENDIENTE"
+        | "APROBADO"
+        | "RECHAZADO";
 }
diff --git a/backend/src/modules/lpg/lpg.model.ts b/backend/src/modules/lpg/lpg.model.ts
index 1d9b9b1..576a712 100644
--- a/backend/src/modules/lpg/lpg.model.ts
+++ b/backend/src/modules/lpg/lpg.model.ts
@@ -10,7 +10,7 @@ const lpgSchema = new mongoose.Schema({
 
     plant:{
         type:String,
-        requiered:true,
+        required:true,
         enum:[
             "Planta 1",
             "Planta 2"
@@ -25,7 +25,7 @@ const lpgSchema = new mongoose.Schema({
     requestedBy:{
         type:mongoose.Schema.Types.ObjectId,
         ref:"User",
-        requeride:true
+        required:true
     },
 
     approvedBy:{
@@ -36,10 +36,10 @@ const lpgSchema = new mongoose.Schema({
     requestDate:{
         type:Date,
         default:Date.now,
-        requiered:true
+        required:true
     },
 
-    gallons:{
+    gallonQuantity:{
         type:Number,
         required:true,
     },
diff --git a/backend/src/modules/lpg/lpg.routes.ts b/backend/src/modules/lpg/lpg.routes.ts
index ab9726b..c442083 100644
--- a/backend/src/modules/lpg/lpg.routes.ts
+++ b/backend/src/modules/lpg/lpg.routes.ts
@@ -10,14 +10,18 @@ const controller = new LPGController();
 //Obtener todas las requisiciones
 lpgRouter.get("/", authMiddleware, controller.getAll);
 
+//Obtener requisición por status
+lpgRouter.get("/status/:status", authMiddleware, controller.getByStatus);
+
+//Obtener requisición por planta
+lpgRouter.get("/plant/:plant", authMiddleware, controller.getByPlant);
+
 //Obtener requisición por ID
 lpgRouter.get("/:id", authMiddleware, controller.getById);
 
-
 //Crear requisición
 lpgRouter.post( "/", authMiddleware, controller.create);
 
-
 //Actualizar requisición
 lpgRouter.put("/:id", authMiddleware, controller.update);
 
diff --git a/backend/src/modules/lpg/lpg.service.ts b/backend/src/modules/lpg/lpg.service.ts
index 6e1af77..1a918a0 100644
--- a/backend/src/modules/lpg/lpg.service.ts
+++ b/backend/src/modules/lpg/lpg.service.ts
@@ -1,29 +1,16 @@
 import lpgModel from "./lpg.model";
 import { ILpg } from "./lpg.interface";
+import { generateRequestLPGNumber } from "../../utils/requestNumber";
 
 export class LPGService{
 
-
-//Crear solicitud gas LPG
-    async create (
-        data:ILpg
-    ){
-
-        data.totalAmount = data.gallons *
-        data.pricePerGallon;
-
-        const lpg = new lpgModel(data);
-
-        return await lpg.save();
- }
-
     //Obtener todas las requisiciones
     async getAll() {
 
         return await lpgModel
         .find()
         .populate("requestedBy")
-        .populate("approveBy")
+        .populate("approvedBy")
     }
 
     //Obtener requisición por Id
@@ -33,21 +20,49 @@ export class LPGService{
         return await lpgModel
         .findById(id)
         .populate("requestedBy")
-        .populate("approveBy")
+        .populate("approvedBy")
+    }
+
+    
+    //Crear solicitud gas LPG
+    async create (
+        data:ILpg
+    ){
+        //Validar que los galones sean mayor a 0
+        if(data.gallonQuantity <= 0){
+            throw new Error ("La cantidad de galones debe ser mayor que 0");
+        }
+        
+        //Generar número automático
+        data.requestNumber = generateRequestLPGNumber();
+
+        data.totalAmount = data.gallonQuantity * data.pricePerGallon;
+
+        //Estado inicial
+        data.status = "PENDIENTE";
+
+        const lpg = new lpgModel(data);
+
+        return await lpg.save();
     }
 
     async update(
         id:string,
         data:Partial<ILpg>
     ){
-        if (data.gallons &&
-            data.pricePerGallon
-        ){
-            data.totalAmount =
-            data.gallons * 
-            data.pricePerGallon
+        //Buscar la requisición actual
+        const lpgRequest = await lpgModel.findById(id);
+            
+        if(!lpgRequest){
+            return null;
         }
 
+        const gallonQuantity = data.gallonQuantity ?? lpgRequest.gallonQuantity;
+
+        const pricePerGallon = data.pricePerGallon ?? lpgRequest.pricePerGallon;
+            
+            data.totalAmount = gallonQuantity * pricePerGallon
+
         return await lpgModel
         .findByIdAndUpdate(
             id,
diff --git a/backend/src/utils/requestNumber.ts b/backend/src/utils/requestNumber.ts
index 2cf8baa..33ba4c3 100644
--- a/backend/src/utils/requestNumber.ts
+++ b/backend/src/utils/requestNumber.ts
@@ -1,3 +1,7 @@
 export const generateRequestNumber = ():string =>{
     return `REQ-${Date.now()}`;
+}
+
+export const generateRequestLPGNumber =():string =>{
+    return `LPG-${Date.now()}`;
 }
\ No newline at end of file